<SUBMISSION>
<ACCESSION-NUMBER>0000912057-02-028082
<TYPE>SC 13G
<PUBLIC-DOCUMENT-COUNT>2
<FILING-DATE>20020722
<GROUP-MEMBERS>BIOTECHNOLOGY VALUE FUND II, L.P.
<GROUP-MEMBERS>BVF INC.
<GROUP-MEMBERS>BVF INVESTMENTS, L.L.C.
<GROUP-MEMBERS>BVF PARTNERS L.P.
<SUBJECT-COMPANY>
<COMPANY-DATA>
<CONFORMED-NAME>3 DIMENSIONAL PHARMACEUTICALS INC
<CIK>0000914201
<ASSIGNED-SIC>2834
<IRS-NUMBER>232716487
<STATE-OF-INCORPORATION>DE
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<FILING-VALUES>
<FORM-TYPE>SC 13G
<ACT>34
<FILE-NUMBER>005-59449
<FILM-NUMBER>02707777
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>665 STOCKTON DRIVE
<STREET2>SUITE 104
<CITY>EXTON
<STATE>PA
<ZIP>19341
<PHONE>6104588959
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>665 STOCKTON DRIVE
<STREET2>SUITE 104
<CITY>EXTON
<STATE>PA
<ZIP>19341
</MAIL-ADDRESS>
</SUBJECT-COMPANY>
<FILED-BY>
<COMPANY-DATA>
<CONFORMED-NAME>BIOTECHNOLOGY VALUE FUND L P
<CIK>0000918923
<ASSIGNED-SIC>6282
<IRS-NUMBER>363924731
<STATE-OF-INCORPORATION>DE
</COMPANY-DATA>
<FILING-VALUES>
<FORM-TYPE>SC 13G
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>227 W MONROE STREET, SUITE 4800
<STREET2>227 W MONROE STREET, SUITE 4800
<CITY>CHICAGO
<STATE>IL
<ZIP>60606
<PHONE>415-288-23
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>227 W MONROE STREET, SUITE 4800
<STREET2>227 W MONROE STREET, SUITE 4800
<CITY>CHICAGO
<STATE>IL
<ZIP>60606
</MAIL-ADDRESS>
</FILED-BY>
<DOCUMENT>
<TYPE>SC 13G
<SEQUENCE>1
<FILENAME>a2084844zsc13g.htm
<DESCRIPTION>SCHEDULE 13G
<TEXT>
<HTML>
<HEAD>
<TITLE>
</TITLE>
</HEAD>
<BODY BGCOLOR="#FFFFFF" LINK=BLUE  VLINK=PURPLE>
<BR>
<FONT SIZE=3 ><A HREF="#02BHL1841_1">QuickLinks</A></FONT>
<font size=3> -- Click here to rapidly navigate through this document</font>
<!-- TOC_END -->
<HR NOSHADE>
<HR NOSHADE>
<P ALIGN="CENTER"><FONT SIZE=5><B>SECURITIES AND EXCHANGE COMMISSION<BR>  </B></FONT><FONT SIZE=2><B>Washington, DC 20549  </B></FONT></P>

<HR NOSHADE ALIGN="CENTER" WIDTH="120">
<P ALIGN="CENTER"><FONT SIZE=2><B> <A NAME="ba1841_schedule_#160;13g"> </A>
<A NAME="ba1841_schedule_13g_(rule_13d-102)"> </A>
<A NAME="toc_ba1841_1"> </A>
<BR>    SCHEDULE 13G<BR>  (Rule&nbsp;13d-102)    <BR>  </B></FONT></P>

<P ALIGN="CENTER"><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT><FONT SIZE=2><B>INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT<BR>
TO RULES 13d-1(b) (c)&nbsp;AND (d)&nbsp;AND AMENDMENTS THERETO FILED<BR>
PURSUANT TO 13d-2(b)<BR>
(Amendment No.&nbsp;&nbsp;&nbsp;&nbsp;)<SUP>1</SUP>  </B></FONT></P>

<P ALIGN="CENTER"><FONT SIZE=2><B> 3-Dimensional Pharmaceuticals,&nbsp;Inc.<BR>  </B></FONT><FONT SIZE=2>(Name of Issuer) </FONT></P>

<P ALIGN="CENTER"><FONT SIZE=2><B>Common Stock<BR>  </B></FONT><FONT SIZE=2>(Title of Class of Securities) </FONT></P>

<P ALIGN="CENTER"><FONT SIZE=2><B>88554W 10 4<BR>  </B></FONT><FONT SIZE=2>(CUSIP Number) </FONT></P>

<P ALIGN="CENTER"><FONT SIZE=2><B>July&nbsp;16, 2002<BR>  </B></FONT><FONT SIZE=2>(Date of Event Which Requires Filing of this Statement) </FONT></P>


<P><FONT SIZE=2>Check
the appropriate box to designate the rule pursuant to which this Schedule is filed: </FONT></P>

<UL>

<P><FONT SIZE=2><FONT FACE="WINGDINGS">&#111;</FONT>&nbsp;&nbsp;&nbsp;&nbsp;Rule&nbsp;13d-1(b)<BR>
<FONT FACE="WINGDINGS">&#253;</FONT>&nbsp;&nbsp;&nbsp;&nbsp;Rule&nbsp;13d-1(c)<BR>
<FONT FACE="WINGDINGS">&#111;</FONT>&nbsp;&nbsp;&nbsp;&nbsp;Rule&nbsp;13d-1(d) </FONT></P>

</UL>
<HR NOSHADE ALIGN="LEFT" WIDTH="120">

<P><FONT SIZE=2><SUP>1</SUP>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The
remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any
subsequent amendment containing information which would alter disclosures provided in a prior cover page. </FONT></P>


<P><FONT SIZE=2>The
information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 or otherwise subject to the
liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, </FONT><FONT SIZE=2><I>see</I></FONT><FONT SIZE=2> the </FONT> <FONT SIZE=2><I>Notes</I></FONT><FONT SIZE=2>). </FONT></P>

<HR NOSHADE>
<HR NOSHADE>
<HR NOSHADE>
<!-- ZEQ.=1,SEQ=1,EFW="2084844",CP="BIOTECHNOLOGY VALUE FUND, L.P.",DN="1",CHK=872113,FOLIO='blank',FILE='DISK044:[02BHL1.02BHL1841]BA1841A.;3',USER='PHENTGE',CD='20-JUL-2002;00:37' -->
<!-- THIS IS THE END OF A COMPOSITION COMPONENT -->

<!-- User-specified TAGGED TABLE -->
<TABLE WIDTH="100%" BORDER=0 CELLSPACING=0 CELLPADDING=0>
<TR VALIGN="TOP">
<TD WIDTH="32%"><HR NOSHADE><FONT SIZE=2><B>CUSIP NO. 88554W 10 4</B></FONT><HR NOSHADE></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="32%" ALIGN="CENTER" VALIGN="CENTER"><FONT SIZE=4><B>13G</B></FONT></TD>
<TD WIDTH="3%" VALIGN="CENTER"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="32%" ALIGN="CENTER"><HR NOSHADE><FONT SIZE=2><B>Page 2 of 9 Pages</B></FONT><HR NOSHADE></TD>
</TR>
</TABLE>
<!-- end of user-specified TAGGED TABLE -->

<!-- User-specified TAGGED TABLE -->
<TABLE WIDTH="100%" BORDER=0 CELLSPACING=0 CELLPADDING=0>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>1</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>NAME OF REPORTING PERSON:<BR></FONT> <FONT SIZE=2><B>Biotechnology Value Fund, L.P.</B></FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2><BR>
I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY):</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2><BR>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>2</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%" ALIGN="RIGHT"><FONT SIZE=2>(a)&nbsp;<FONT FACE="WINGDINGS">&#253;</FONT></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%" ALIGN="RIGHT"><FONT SIZE=2>(b)&nbsp;<FONT FACE="WINGDINGS">&#111;</FONT></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>3</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>SEC USE ONLY</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2><BR>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>4</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>CITIZENSHIP OR PLACE OF ORGANIZATION</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="86%"><BR><FONT SIZE=2><B>Delaware</B></FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2><BR>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
</TABLE>
<!-- end of user-specified TAGGED TABLE -->

<!-- User-specified TAGGED TABLE -->
<TABLE WIDTH="100%" BORDER=0 CELLSPACING=0 CELLPADDING=0>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="CENTER"><FONT SIZE=2>5</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="74%"><FONT SIZE=2>SOLE VOTING POWER</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>NUMBER OF</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="CENTER"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="74%"><FONT SIZE=2><B>0</B></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>SHARES</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD COLSPAN=3 ALIGN="CENTER"><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>BENEFICIALLY</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="CENTER"><FONT SIZE=2>6</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="74%"><FONT SIZE=2>SHARED VOTING POWER</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>OWNED</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="CENTER"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="74%"><FONT SIZE=2><B>357,625</B></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>BY</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD COLSPAN=3 ALIGN="CENTER"><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>EACH</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="CENTER"><FONT SIZE=2>7</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="74%"><FONT SIZE=2>SOLE DISPOSITIVE POWER</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>REPORTING</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="CENTER"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="74%"><FONT SIZE=2><B>0</B></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>PERSON</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD COLSPAN=3 ALIGN="CENTER"><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>WITH</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="CENTER"><FONT SIZE=2>8</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="74%"><FONT SIZE=2>SHARED DISPOSITIVE POWER</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="CENTER"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="74%"><FONT SIZE=2><B>357,635</B></FONT></TD>
</TR>
</TABLE>
<!-- end of user-specified TAGGED TABLE -->

<!-- User-specified TAGGED TABLE -->
<TABLE WIDTH="100%" BORDER=0 CELLSPACING=0 CELLPADDING=0>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>9</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="86%"><BR><FONT SIZE=2><B>357,625</B></FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2><BR>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>10</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2><BR>&nbsp;</FONT></TD>
<TD WIDTH="8%" ALIGN="RIGHT"><FONT SIZE=2><BR>
<FONT FACE="WINGDINGS">&#111;</FONT></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>11</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="86%"><BR><FONT SIZE=2><B>1.6%</B></FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2><BR>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>12</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>TYPE OF REPORTING PERSON*</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="86%"><BR><FONT SIZE=2><B>PN</B></FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2><BR>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4 ALIGN="CENTER"><BR><FONT SIZE=2><B>* SEE INSTRUCTIONS BEFORE FILLING OUT!</B></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2><BR>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
</TR>
</TABLE>
<!-- end of user-specified TAGGED TABLE -->

<HR NOSHADE>
<!-- ZEQ.=1,SEQ=2,EFW="2084844",CP="BIOTECHNOLOGY VALUE FUND, L.P.",DN="1",CHK=346518,FOLIO='blank',FILE='DISK044:[02BHL1.02BHL1841]DE1841A.;5',USER='KSOLTER',CD='22-JUL-2002;10:46' -->

<!-- User-specified TAGGED TABLE -->
<TABLE WIDTH="100%" BORDER=0 CELLSPACING=0 CELLPADDING=0>
<TR VALIGN="TOP">
<TD WIDTH="32%"><HR NOSHADE><FONT SIZE=2><B>CUSIP NO. 88554W 10 4</B></FONT><HR NOSHADE></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="32%" ALIGN="CENTER" VALIGN="CENTER"><FONT SIZE=4><B>13G</B></FONT></TD>
<TD WIDTH="3%" VALIGN="CENTER"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="32%" ALIGN="CENTER"><HR NOSHADE><FONT SIZE=2><B>Page 3 of 9 Pages</B></FONT><HR NOSHADE></TD>
</TR>
</TABLE>
<!-- end of user-specified TAGGED TABLE -->

<!-- User-specified TAGGED TABLE -->
<TABLE WIDTH="100%" BORDER=0 CELLSPACING=0 CELLPADDING=0>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>1</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>NAME OF REPORTING PERSON:<BR></FONT> <FONT SIZE=2><B>Biotechnology Value Fund II, L.P.</B></FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2><BR>
I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY):</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2><BR>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>2</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%" ALIGN="RIGHT"><FONT SIZE=2>(a)&nbsp;<FONT FACE="WINGDINGS">&#253;</FONT></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%" ALIGN="RIGHT"><FONT SIZE=2>(b)&nbsp;<FONT FACE="WINGDINGS">&#111;</FONT></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>3</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>SEC USE ONLY</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2><BR>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>4</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>CITIZENSHIP OR PLACE OF ORGANIZATION</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="86%"><BR><FONT SIZE=2><B>Delaware</B></FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2><BR>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
</TABLE>
<!-- end of user-specified TAGGED TABLE -->

<!-- User-specified TAGGED TABLE -->
<TABLE WIDTH="100%" BORDER=0 CELLSPACING=0 CELLPADDING=0>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="CENTER"><FONT SIZE=2>5</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="74%"><FONT SIZE=2>SOLE VOTING POWER</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>NUMBER OF</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="CENTER"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="74%"><FONT SIZE=2><B>0</B></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>SHARES</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD COLSPAN=3 ALIGN="CENTER"><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>BENEFICIALLY</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="CENTER"><FONT SIZE=2>6</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="74%"><FONT SIZE=2>SHARED VOTING POWER</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>OWNED</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="CENTER"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="74%"><FONT SIZE=2><B>236,200</B></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>BY</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD COLSPAN=3 ALIGN="CENTER"><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>EACH</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="CENTER"><FONT SIZE=2>7</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="74%"><FONT SIZE=2>SOLE DISPOSITIVE POWER</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>REPORTING</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="CENTER"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="74%"><FONT SIZE=2><B>0</B></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>PERSON</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD COLSPAN=3 ALIGN="CENTER"><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>WITH</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="CENTER"><FONT SIZE=2>8</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="74%"><FONT SIZE=2>SHARED DISPOSITIVE POWER</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="CENTER"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="74%"><FONT SIZE=2><B>236,200</B></FONT></TD>
</TR>
</TABLE>
<!-- end of user-specified TAGGED TABLE -->

<!-- User-specified TAGGED TABLE -->
<TABLE WIDTH="100%" BORDER=0 CELLSPACING=0 CELLPADDING=0>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>9</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="86%"><BR><FONT SIZE=2><B>236,200</B></FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2><BR>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>10</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2><BR>&nbsp;</FONT></TD>
<TD WIDTH="8%" ALIGN="RIGHT"><FONT SIZE=2><BR>
<FONT FACE="WINGDINGS">&#111;</FONT></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>11</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="86%"><BR><FONT SIZE=2><B>1.1%</B></FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2><BR>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>12</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>TYPE OF REPORTING PERSON*</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="86%"><BR><FONT SIZE=2><B>PN</B></FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2><BR>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4 ALIGN="CENTER"><BR><FONT SIZE=2><B>* SEE INSTRUCTIONS BEFORE FILLING OUT!</B></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2><BR>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
</TR>
</TABLE>
<!-- end of user-specified TAGGED TABLE -->

<HR NOSHADE>
<!-- ZEQ.=2,SEQ=3,EFW="2084844",CP="BIOTECHNOLOGY VALUE FUND, L.P.",DN="1",CHK=794493,FOLIO='blank',FILE='DISK044:[02BHL1.02BHL1841]DE1841A.;5',USER='KSOLTER',CD='22-JUL-2002;10:46' -->

<!-- User-specified TAGGED TABLE -->
<TABLE WIDTH="100%" BORDER=0 CELLSPACING=0 CELLPADDING=0>
<TR VALIGN="TOP">
<TD WIDTH="32%"><HR NOSHADE><FONT SIZE=2><B>CUSIP NO. 88554W 10 4</B></FONT><HR NOSHADE></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="32%" ALIGN="CENTER" VALIGN="CENTER"><FONT SIZE=4><B>13G</B></FONT></TD>
<TD WIDTH="3%" VALIGN="CENTER"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="32%" ALIGN="CENTER"><HR NOSHADE><FONT SIZE=2><B>Page 4 of 9 Pages</B></FONT><HR NOSHADE></TD>
</TR>
</TABLE>
<!-- end of user-specified TAGGED TABLE -->

<!-- User-specified TAGGED TABLE -->
<TABLE WIDTH="100%" BORDER=0 CELLSPACING=0 CELLPADDING=0>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>1</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>NAME OF REPORTING PERSON:<BR></FONT> <FONT SIZE=2><B>BVF Investments, L.L.C.</B></FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2><BR>
I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY):</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2><BR>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>2</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%" ALIGN="RIGHT"><FONT SIZE=2>(a)&nbsp;<FONT FACE="WINGDINGS">&#253;</FONT></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%" ALIGN="RIGHT"><FONT SIZE=2>(b)&nbsp;<FONT FACE="WINGDINGS">&#111;</FONT></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>3</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>SEC USE ONLY</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2><BR>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>4</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>CITIZENSHIP OR PLACE OF ORGANIZATION</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="86%"><BR><FONT SIZE=2><B>Delaware</B></FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2><BR>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
</TABLE>
<!-- end of user-specified TAGGED TABLE -->

<!-- User-specified TAGGED TABLE -->
<TABLE WIDTH="100%" BORDER=0 CELLSPACING=0 CELLPADDING=0>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="CENTER"><FONT SIZE=2>5</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="74%"><FONT SIZE=2>SOLE VOTING POWER</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>NUMBER OF</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="CENTER"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="74%"><FONT SIZE=2><B>0</B></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>SHARES</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD COLSPAN=3 ALIGN="CENTER"><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>BENEFICIALLY</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="CENTER"><FONT SIZE=2>6</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="74%"><FONT SIZE=2>SHARED VOTING POWER</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>OWNED</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="CENTER"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="74%"><FONT SIZE=2><B>545,760</B></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>BY</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD COLSPAN=3 ALIGN="CENTER"><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>EACH</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="CENTER"><FONT SIZE=2>7</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="74%"><FONT SIZE=2>SOLE DISPOSITIVE POWER</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>REPORTING</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="CENTER"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="74%"><FONT SIZE=2><B>0</B></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>PERSON</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD COLSPAN=3 ALIGN="CENTER"><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>WITH</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="CENTER"><FONT SIZE=2>8</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="74%"><FONT SIZE=2>SHARED DISPOSITIVE POWER</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="CENTER"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="74%"><FONT SIZE=2><B>545,760</B></FONT></TD>
</TR>
</TABLE>
<!-- end of user-specified TAGGED TABLE -->

<!-- User-specified TAGGED TABLE -->
<TABLE WIDTH="100%" BORDER=0 CELLSPACING=0 CELLPADDING=0>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>9</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="86%"><BR><FONT SIZE=2><B>545,760</B></FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2><BR>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>10</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2><BR>&nbsp;</FONT></TD>
<TD WIDTH="8%" ALIGN="RIGHT"><FONT SIZE=2><BR>
<FONT FACE="WINGDINGS">&#111;</FONT></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>11</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="86%"><BR><FONT SIZE=2><B>2.4%</B></FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2><BR>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>12</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>TYPE OF REPORTING PERSON*</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="86%"><BR><FONT SIZE=2><B>OO</B></FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2><BR>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4 ALIGN="CENTER"><BR><FONT SIZE=2><B>* SEE INSTRUCTIONS BEFORE FILLING OUT!</B></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2><BR>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
</TR>
</TABLE>
<!-- end of user-specified TAGGED TABLE -->

<HR NOSHADE>
<!-- ZEQ.=3,SEQ=4,EFW="2084844",CP="BIOTECHNOLOGY VALUE FUND, L.P.",DN="1",CHK=954184,FOLIO='blank',FILE='DISK044:[02BHL1.02BHL1841]DE1841A.;5',USER='KSOLTER',CD='22-JUL-2002;10:46' -->

<!-- User-specified TAGGED TABLE -->
<TABLE WIDTH="100%" BORDER=0 CELLSPACING=0 CELLPADDING=0>
<TR VALIGN="TOP">
<TD WIDTH="32%"><HR NOSHADE><FONT SIZE=2><B>CUSIP NO. 88554W 10 4</B></FONT><HR NOSHADE></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="32%" ALIGN="CENTER" VALIGN="CENTER"><FONT SIZE=4><B>13G</B></FONT></TD>
<TD WIDTH="3%" VALIGN="CENTER"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="32%" ALIGN="CENTER"><HR NOSHADE><FONT SIZE=2><B>Page 5 of 9 Pages</B></FONT><HR NOSHADE></TD>
</TR>
</TABLE>
<!-- end of user-specified TAGGED TABLE -->

<!-- User-specified TAGGED TABLE -->
<TABLE WIDTH="100%" BORDER=0 CELLSPACING=0 CELLPADDING=0>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>1</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>NAME OF REPORTING PERSON:<BR></FONT> <FONT SIZE=2><B>BVF Partners L.P.</B></FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2><BR>
I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY):</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2><BR>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>2</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%" ALIGN="RIGHT"><FONT SIZE=2>(a)&nbsp;<FONT FACE="WINGDINGS">&#253;</FONT></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%" ALIGN="RIGHT"><FONT SIZE=2>(b)&nbsp;<FONT FACE="WINGDINGS">&#111;</FONT></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>3</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>SEC USE ONLY</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2><BR>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>4</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>CITIZENSHIP OR PLACE OF ORGANIZATION</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="86%"><BR><FONT SIZE=2><B>Delaware</B></FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2><BR>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
</TABLE>
<!-- end of user-specified TAGGED TABLE -->

<!-- User-specified TAGGED TABLE -->
<TABLE WIDTH="100%" BORDER=0 CELLSPACING=0 CELLPADDING=0>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="CENTER"><FONT SIZE=2>5</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="74%"><FONT SIZE=2>SOLE VOTING POWER</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>NUMBER OF</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="CENTER"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="74%"><FONT SIZE=2><B>0</B></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>SHARES</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD COLSPAN=3 ALIGN="CENTER"><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>BENEFICIALLY</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="CENTER"><FONT SIZE=2>6</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="74%"><FONT SIZE=2>SHARED VOTING POWER</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>OWNED</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="CENTER"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="74%"><FONT SIZE=2><B>1,185,825</B></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>BY</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD COLSPAN=3 ALIGN="CENTER"><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>EACH</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="CENTER"><FONT SIZE=2>7</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="74%"><FONT SIZE=2>SOLE DISPOSITIVE POWER</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>REPORTING</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="CENTER"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="74%"><FONT SIZE=2><B>0</B></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>PERSON</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD COLSPAN=3 ALIGN="CENTER"><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>WITH</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="CENTER"><FONT SIZE=2>8</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="74%"><FONT SIZE=2>SHARED DISPOSITIVE POWER</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="CENTER"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="74%"><FONT SIZE=2><B>1,185,825</B></FONT></TD>
</TR>
</TABLE>
<!-- end of user-specified TAGGED TABLE -->

<!-- User-specified TAGGED TABLE -->
<TABLE WIDTH="100%" BORDER=0 CELLSPACING=0 CELLPADDING=0>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>9</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="86%"><BR><FONT SIZE=2><B>1,185,825</B></FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2><BR>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>10</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2><BR>&nbsp;</FONT></TD>
<TD WIDTH="8%" ALIGN="RIGHT"><FONT SIZE=2><BR>
<FONT FACE="WINGDINGS">&#111;</FONT></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>11</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="86%"><BR><FONT SIZE=2><B>5.3%</B></FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2><BR>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>12</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>TYPE OF REPORTING PERSON*</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="86%"><BR><FONT SIZE=2><B>PN</B></FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2><BR>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4 ALIGN="CENTER"><BR><FONT SIZE=2><B>* SEE INSTRUCTIONS BEFORE FILLING OUT!</B></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2><BR>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
</TR>
</TABLE>
<!-- end of user-specified TAGGED TABLE -->

<HR NOSHADE>
<!-- ZEQ.=4,SEQ=5,EFW="2084844",CP="BIOTECHNOLOGY VALUE FUND, L.P.",DN="1",CHK=309560,FOLIO='blank',FILE='DISK044:[02BHL1.02BHL1841]DE1841A.;5',USER='KSOLTER',CD='22-JUL-2002;10:46' -->

<!-- User-specified TAGGED TABLE -->
<TABLE WIDTH="100%" BORDER=0 CELLSPACING=0 CELLPADDING=0>
<TR VALIGN="TOP">
<TD WIDTH="32%"><HR NOSHADE><FONT SIZE=2><B>CUSIP NO. 88554W 10 4</B></FONT><HR NOSHADE></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="32%" ALIGN="CENTER" VALIGN="CENTER"><FONT SIZE=4><B>13G</B></FONT></TD>
<TD WIDTH="3%" VALIGN="CENTER"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="32%" ALIGN="CENTER"><HR NOSHADE><FONT SIZE=2><B>Page 6 of 9 Pages</B></FONT><HR NOSHADE></TD>
</TR>
</TABLE>
<!-- end of user-specified TAGGED TABLE -->

<!-- User-specified TAGGED TABLE -->
<TABLE WIDTH="100%" BORDER=0 CELLSPACING=0 CELLPADDING=0>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>1</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>NAME OF REPORTING PERSON:<BR></FONT> <FONT SIZE=2><B>BVF Inc.</B></FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2><BR>
I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY):</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2><BR>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>2</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%" ALIGN="RIGHT"><FONT SIZE=2>(a)&nbsp;<FONT FACE="WINGDINGS">&#253;</FONT></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%" ALIGN="RIGHT"><FONT SIZE=2>(b)&nbsp;<FONT FACE="WINGDINGS">&#111;</FONT></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>3</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>SEC USE ONLY</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2><BR>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>4</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>CITIZENSHIP OR PLACE OF ORGANIZATION</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="86%"><BR><FONT SIZE=2><B>Delaware</B></FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2><BR>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
</TABLE>
<!-- end of user-specified TAGGED TABLE -->

<!-- User-specified TAGGED TABLE -->
<TABLE WIDTH="100%" BORDER=0 CELLSPACING=0 CELLPADDING=0>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="CENTER"><FONT SIZE=2>5</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="74%"><FONT SIZE=2>SOLE VOTING POWER</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>NUMBER OF</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="CENTER"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="74%"><FONT SIZE=2><B>0</B></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>SHARES</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD COLSPAN=3 ALIGN="CENTER"><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>BENEFICIALLY</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="CENTER"><FONT SIZE=2>6</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="74%"><FONT SIZE=2>SHARED VOTING POWER</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>OWNED</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="CENTER"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="74%"><FONT SIZE=2><B>1,185,825</B></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>BY</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD COLSPAN=3 ALIGN="CENTER"><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>EACH</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="CENTER"><FONT SIZE=2>7</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="74%"><FONT SIZE=2>SOLE DISPOSITIVE POWER</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>REPORTING</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="CENTER"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="74%"><FONT SIZE=2><B>0</B></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>PERSON</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD COLSPAN=3 ALIGN="CENTER"><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>WITH</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="CENTER"><FONT SIZE=2>8</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="74%"><FONT SIZE=2>SHARED DISPOSITIVE POWER</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="20%" ALIGN="CENTER"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="CENTER"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="74%"><FONT SIZE=2><B>1,185,825</B></FONT></TD>
</TR>
</TABLE>
<!-- end of user-specified TAGGED TABLE -->

<!-- User-specified TAGGED TABLE -->
<TABLE WIDTH="100%" BORDER=0 CELLSPACING=0 CELLPADDING=0>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>9</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="86%"><BR><FONT SIZE=2><B>1,185,825</B></FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2><BR>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>10</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2><BR>&nbsp;</FONT></TD>
<TD WIDTH="8%" ALIGN="RIGHT"><FONT SIZE=2><BR>
<FONT FACE="WINGDINGS">&#111;</FONT></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>11</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="86%"><BR><FONT SIZE=2><B>5.3%</B></FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2><BR>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2>12</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2>TYPE OF REPORTING PERSON*</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="86%"><BR><FONT SIZE=2><B>IA, CO</B></FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2><BR>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=4 ALIGN="CENTER"><BR><FONT SIZE=2><B>* SEE INSTRUCTIONS BEFORE FILLING OUT!</B></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="4%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="86%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2><BR>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
</TR>
</TABLE>
<!-- end of user-specified TAGGED TABLE -->

<HR NOSHADE>
<!-- ZEQ.=5,SEQ=6,EFW="2084844",CP="BIOTECHNOLOGY VALUE FUND, L.P.",DN="1",CHK=450780,FOLIO='blank',FILE='DISK044:[02BHL1.02BHL1841]DE1841A.;5',USER='KSOLTER',CD='22-JUL-2002;10:46' -->
<!-- THIS IS THE END OF A COMPOSITION COMPONENT -->
<!-- TOC_END -->

<!-- User-specified TAGGED TABLE -->
<TABLE WIDTH="100%" BORDER=0 CELLSPACING=0 CELLPADDING=0>
<TR VALIGN="TOP">
<TD WIDTH="32%"><HR NOSHADE><FONT SIZE=2><B>CUSIP NO. 88554W 10 4</B></FONT><HR NOSHADE></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="32%" ALIGN="CENTER" VALIGN="CENTER"><FONT SIZE=4><B>13G</B></FONT></TD>
<TD WIDTH="3%" VALIGN="CENTER"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="32%" ALIGN="CENTER"><HR NOSHADE><FONT SIZE=2><B>Page 7 of 9 Pages</B></FONT><HR NOSHADE></TD>
</TR>
</TABLE>
<!-- end of user-specified TAGGED TABLE -->


<P><FONT SIZE=2><B>ITEM 1(a). NAME OF ISSUER:  </B></FONT></P>

<UL>
<UL>

<P><FONT SIZE=2>3-Dimensional
Pharmaceuticals,&nbsp;Inc. ("3-D") </FONT></P>

</UL>
</UL>

<P><FONT SIZE=2><A
NAME="dg1841_item_1(b)._address_of_i__dg102186"> </A>
<A NAME="toc_dg1841_1"> </A>
<BR></FONT><FONT SIZE=2><B>ITEM 1(b). ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:    <BR>  </B></FONT></P>

<UL>
<UL>

<P><FONT SIZE=2>Three
Lower Makefield Corporate Center<BR>
1020 Stony Hill Road<BR>
Yardley, Pennsylvania 19067 </FONT></P>

</UL>
</UL>

<P><FONT SIZE=2><A
NAME="dg1841_item_2(a)._name_of_person_filing_"> </A>
<A NAME="toc_dg1841_2"> </A>
<BR></FONT><FONT SIZE=2><B>ITEM 2(a). NAME OF PERSON FILING:    <BR>  </B></FONT></P>

<UL>
<UL>

<P><FONT SIZE=2>This
Schedule&nbsp;13G is being filed on behalf of the following persons* (the "Reporting Persons"): </FONT></P>

<DL compact>
<DT style='margin-bottom:-11pt;'><FONT SIZE=2>(i)</FONT></DT><DD><FONT SIZE=2>Biotechnology
Value Fund, L.P. ("BVF") </FONT></DD><DT style='margin-bottom:-11pt;'><FONT SIZE=2>(ii)</FONT></DT><DD><FONT SIZE=2>Biotechnology
Value Fund II, L.P. ("BVF2") </FONT></DD><DT style='margin-bottom:-11pt;'><FONT SIZE=2>(iii)</FONT></DT><DD><FONT SIZE=2>BVF
Investments, L.L.C. ("Investments") </FONT></DD><DT style='margin-bottom:-11pt;'><FONT SIZE=2>(iv)</FONT></DT><DD><FONT SIZE=2>BVF
Partners L.P. ("Partners") </FONT></DD><DT style='margin-bottom:-11pt;'><FONT SIZE=2>(v)</FONT></DT><DD><FONT SIZE=2>BVF&nbsp;Inc.
("BVF&nbsp;Inc.")
<BR><BR></FONT></DD><DT style='margin-bottom:-11pt;'><FONT SIZE=2>*</FONT></DT><DD><FONT SIZE=2>Attached
as Exhibit&nbsp;1 is a copy of an agreement among the Reporting Persons filing (as specified hereinabove) that this Schedule&nbsp;13G is being filed on behalf of each of
them. </FONT></DD></DL>
</UL>
</UL>

<P><FONT SIZE=2><A
NAME="dg1841_item_2(b)._address_of_principal_business_office_"> </A>
<A NAME="toc_dg1841_3"> </A>
<BR></FONT><FONT SIZE=2><B>ITEM 2(b). ADDRESS OF PRINCIPAL BUSINESS OFFICE:    <BR>  </B></FONT></P>

<UL>
<UL>

<P><FONT SIZE=2>The
principal business office of the Reporting Persons comprising the group filing this Schedule&nbsp;13G is located at 227 West Monroe Street, Suite 4800, Chicago, Illinois, 60606. </FONT></P>

</UL>
</UL>

<P><FONT SIZE=2><A
NAME="dg1841_item_2(c)._citizenship_"> </A>
<A NAME="toc_dg1841_4"> </A>
<BR></FONT><FONT SIZE=2><B>ITEM 2(c). CITIZENSHIP:    <BR>  </B></FONT></P>

<!-- User-specified TAGGED TABLE -->
<DIV ALIGN="CENTER"><TABLE WIDTH="80%" BORDER=0 CELLSPACING=0 CELLPADDING=0>
<TR VALIGN="TOP">
<TD WIDTH="32%"><FONT SIZE=2>BVF:</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="64%"><FONT SIZE=2>a Delaware limited partnership</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="32%"><FONT SIZE=2>BVF2:</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="64%"><FONT SIZE=2>a Delaware limited partnership</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="32%"><FONT SIZE=2>Investments:</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="64%"><FONT SIZE=2>a Delaware limited liability company</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="32%"><FONT SIZE=2>Partners:</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="64%"><FONT SIZE=2>a Delaware limited partnership</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="32%"><FONT SIZE=2>BVF Inc.:</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="64%"><FONT SIZE=2>a Delaware corporation</FONT></TD>
</TR>
</TABLE></DIV>
<!-- end of user-specified TAGGED TABLE -->


<P><FONT SIZE=2><A
NAME="dg1841_item_2(d)._title_of_class_of_securities_"> </A>
<A NAME="toc_dg1841_5"> </A>
<BR></FONT><FONT SIZE=2><B>ITEM 2(d). TITLE OF CLASS OF SECURITIES:    <BR>  </B></FONT></P>

<UL>
<UL>

<P><FONT SIZE=2>Common
Stock. </FONT></P>

</UL>
</UL>

<P><FONT SIZE=2><A
NAME="dg1841_item_2(e)._cusip_number_"> </A>
<A NAME="toc_dg1841_6"> </A>
<BR></FONT><FONT SIZE=2><B>ITEM 2(e). CUSIP Number:    <BR>  </B></FONT></P>

<UL>
<UL>

<P><FONT SIZE=2>88554W
10 4 </FONT></P>

</UL>
</UL>
<HR NOSHADE>
<!-- ZEQ.=1,SEQ=7,EFW="2084844",CP="BIOTECHNOLOGY VALUE FUND, L.P.",DN="1",CHK=326542,FOLIO='blank',FILE='DISK044:[02BHL1.02BHL1841]DG1841A.;4',USER='PHENTGE',CD='20-JUL-2002;00:37' -->
<UL>
<UL>
</UL>
</UL>
<!-- User-specified TAGGED TABLE -->
<TABLE WIDTH="100%" BORDER=0 CELLSPACING=0 CELLPADDING=0>
<TR VALIGN="TOP">
<TD WIDTH="32%"><HR NOSHADE><FONT SIZE=2><B>CUSIP NO. 88554W 10 4</B></FONT><HR NOSHADE></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="32%" ALIGN="CENTER" VALIGN="CENTER"><FONT SIZE=4><B>13G</B></FONT></TD>
<TD WIDTH="3%" VALIGN="CENTER"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="32%" ALIGN="CENTER"><HR NOSHADE><FONT SIZE=2><B>Page 8 of 9 Pages</B></FONT><HR NOSHADE></TD>
</TR>
</TABLE>
<!-- end of user-specified TAGGED TABLE -->


<P><FONT SIZE=2><A
NAME="dg1841_item_3._if_this_statement_is_f__ite04487"> </A>
<A NAME="toc_dg1841_7"> </A>
<BR></FONT><FONT SIZE=2><B>ITEM 3. IF THIS STATEMENT IS FILED PURSUANT TO RULE 13d-1(b), or 13d-2(b) or (c)&nbsp;CHECK WHETHER<BR> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;THE PERSON FILING IS:
One of the following    <BR>  </B></FONT></P>

<UL>
<UL>

<P><FONT SIZE=2>Not
applicable as this Schedule&nbsp;13G is filed pursuant to Rule&nbsp;13d 1(c). </FONT></P>

</UL>
</UL>

<P><FONT SIZE=2><A
NAME="dg1841_item_4._ownership_"> </A>
<A NAME="toc_dg1841_8"> </A>
<BR></FONT><FONT SIZE=2><B>ITEM 4. OWNERSHIP:    <BR>  </B></FONT></P>

<UL>
<UL>

<P><FONT SIZE=2>The
information in items 1 and 5 through 11 on the cover pages (pp. 2&nbsp;-&nbsp;6) on this Schedule&nbsp;13G is hereby incorporated by reference. </FONT></P>

</UL>
</UL>

<P><FONT SIZE=2><A
NAME="dg1841_item_5._ownership_of_five_percent_or_less_of_a_class_"> </A>
<A NAME="toc_dg1841_9"> </A>
<BR></FONT><FONT SIZE=2><B>ITEM 5. OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS:    <BR>  </B></FONT></P>

<UL>
<UL>

<P><FONT SIZE=2>If
this statement is being filed to report the fact that as of the date hereof the Reporting Persons have ceased to be the beneficial owner of more than five percent of the class of securities check
the following.&nbsp;/&nbsp;/ </FONT></P>

</UL>
</UL>

<P><FONT SIZE=2><A
NAME="dg1841_item_6._ownership_of_more_than__ite02791"> </A>
<A NAME="toc_dg1841_10"> </A>
<BR></FONT><FONT SIZE=2><B>ITEM 6. OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON:    <BR>  </B></FONT></P>

<UL>
<UL>

<P><FONT SIZE=2>BVF
shares voting and dispositive power over the shares of the common stock it beneficially owns with Partners. BVF2 also shares voting and dispositive power over the shares of the common stock it
beneficially owns with Partners. Investments also shares voting and dispositive power over the shares of the common stock it beneficially owns with Partners. Partners and BVF&nbsp;Inc. share voting
and dispositive power over the shares of the common stock they beneficially own with, in addition to BVF, BVF2 and Investments, certain managed accounts on whose behalf Partners, as investment
manager, purchased such shares. None of the managed accounts individually owns more than 5% of the common stock of 3-D. </FONT></P>

</UL>
</UL>

<P><FONT SIZE=2><A
NAME="dg1841_item_7._identification_and_cla__ite05369"> </A>
<A NAME="toc_dg1841_11"> </A>
<BR></FONT><FONT SIZE=2><B>ITEM 7. IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE<BR> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;SECURITY BEING REPORTED ON BY THE PARENT
HOLDING COMPANY:    <BR>  </B></FONT></P>

<UL>
<UL>

<P><FONT SIZE=2>Not
applicable. </FONT></P>

</UL>
</UL>

<P><FONT SIZE=2><A
NAME="dg1841_item_8._identification_and_cla__ite02423"> </A>
<A NAME="toc_dg1841_12"> </A>
<BR></FONT><FONT SIZE=2><B>ITEM 8. IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF A GROUP:    <BR>  </B></FONT></P>

<UL>
<UL>

<P><FONT SIZE=2>Not
applicable. </FONT></P>

</UL>
</UL>

<P><FONT SIZE=2><A
NAME="dg1841_item_9._notice_of_dissolution_of_group_"> </A>
<A NAME="toc_dg1841_13"> </A>
<BR></FONT><FONT SIZE=2><B>ITEM 9. NOTICE OF DISSOLUTION OF GROUP:    <BR>  </B></FONT></P>

<UL>
<UL>

<P><FONT SIZE=2>Not
applicable. </FONT></P>

</UL>
</UL>
<HR NOSHADE>
<!-- ZEQ.=2,SEQ=8,EFW="2084844",CP="BIOTECHNOLOGY VALUE FUND, L.P.",DN="1",CHK=299819,FOLIO='blank',FILE='DISK044:[02BHL1.02BHL1841]DG1841A.;4',USER='PHENTGE',CD='20-JUL-2002;00:37' -->
<UL>
<UL>
</UL>
</UL>
<!-- User-specified TAGGED TABLE -->
<TABLE WIDTH="100%" BORDER=0 CELLSPACING=0 CELLPADDING=0>
<TR VALIGN="TOP">
<TD WIDTH="32%"><HR NOSHADE><FONT SIZE=2><B>CUSIP NO. 88554W 10 4</B></FONT><HR NOSHADE></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="32%" ALIGN="CENTER" VALIGN="CENTER"><FONT SIZE=4><B>13G</B></FONT></TD>
<TD WIDTH="3%" VALIGN="CENTER"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="32%" ALIGN="CENTER"><HR NOSHADE><FONT SIZE=2><B>Page 9 of 9 Pages</B></FONT><HR NOSHADE></TD>
</TR>
</TABLE>
<!-- end of user-specified TAGGED TABLE -->


<P><FONT SIZE=2><A
NAME="dg1841_item_10._certification"> </A>
<A NAME="toc_dg1841_14"> </A>
<BR></FONT><FONT SIZE=2><B>ITEM 10. CERTIFICATION    <BR>  </B></FONT></P>

<P><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or
with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that
purpose or effect. </FONT></P>

<P><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;After
reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. </FONT></P>

<!-- User-specified TAGGED TABLE -->
<TABLE WIDTH="100%" BORDER=0 CELLSPACING=0 CELLPADDING=0>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>Dated:&nbsp;&nbsp;July&nbsp;22, 2002</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD COLSPAN=4><FONT SIZE=2><B>BIOTECHNOLOGY VALUE FUND, L.P.</B></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>By:</FONT></TD>
<TD COLSPAN=3><FONT SIZE=2>BVF Partners L.P., its general partner</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>By:</FONT></TD>
<TD COLSPAN=2><FONT SIZE=2>BVF Inc., its general partner</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>By:</FONT></TD>
<TD WIDTH="42%"><FONT SIZE=2>/s/&nbsp;&nbsp;</FONT><FONT SIZE=2>MARK N. LAMPERT</FONT><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT><HR NOSHADE><FONT SIZE=2> Mark N. Lampert<BR>
President</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD COLSPAN=4><FONT SIZE=2><B>BIOTECHNOLOGY VALUE FUND II, L.P.</B></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>By:</FONT></TD>
<TD COLSPAN=3><FONT SIZE=2>BVF Partners L.P., its general partner</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>By:</FONT></TD>
<TD COLSPAN=2><FONT SIZE=2>BVF Inc., its general partner</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>By:</FONT></TD>
<TD WIDTH="42%"><FONT SIZE=2>/s/&nbsp;&nbsp;</FONT><FONT SIZE=2>MARK N. LAMPERT</FONT><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT><HR NOSHADE><FONT SIZE=2> Mark N. Lampert<BR>
President</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD COLSPAN=4><FONT SIZE=2><B>BVF INVESTMENTS, L.L.C.</B></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>By:</FONT></TD>
<TD COLSPAN=3><FONT SIZE=2>BVF Partners L.P., its manager</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>By:</FONT></TD>
<TD COLSPAN=2><FONT SIZE=2>BVF Inc., its general partner</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>By:</FONT></TD>
<TD WIDTH="42%"><FONT SIZE=2>/s/&nbsp;&nbsp;</FONT><FONT SIZE=2>MARK N. LAMPERT</FONT><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT><HR NOSHADE><FONT SIZE=2> Mark N. Lampert<BR>
President</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD COLSPAN=4><FONT SIZE=2><B>BVF PARTNERS L.P.</B></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>By:</FONT></TD>
<TD COLSPAN=3><FONT SIZE=2>BVF Inc., its general partner</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>By:</FONT></TD>
<TD COLSPAN=2><FONT SIZE=2>/s/&nbsp;&nbsp;</FONT><FONT SIZE=2>MARK N. LAMPERT</FONT><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT><HR NOSHADE><FONT SIZE=2> Mark N. Lampert<BR>
President</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD COLSPAN=4><FONT SIZE=2><B>BVF INC.</B></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>By:</FONT></TD>
<TD COLSPAN=3><FONT SIZE=2>/s/&nbsp;&nbsp;</FONT><FONT SIZE=2>MARK N. LAMPERT</FONT><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT><HR NOSHADE><FONT SIZE=2> Mark N. Lampert<BR>
President</FONT></TD>
</TR>
</TABLE>
<!-- end of user-specified TAGGED TABLE -->

<HR NOSHADE>
<!-- ZEQ.=3,SEQ=9,EFW="2084844",CP="BIOTECHNOLOGY VALUE FUND, L.P.",DN="1",CHK=943317,FOLIO='blank',FILE='DISK044:[02BHL1.02BHL1841]DG1841A.;4',USER='PHENTGE',CD='20-JUL-2002;00:37' -->
<!-- THIS IS THE END OF A COMPOSITION COMPONENT -->
<BR>
<P><br><A NAME="02BHL1841_1">QuickLinks</A><br></P><!-- TOC_BEGIN -->
<FONT SIZE=2><A HREF="#toc_ba1841_1">SCHEDULE&#160;13G</A></FONT><BR>
<!-- TOC_BEGIN -->
<FONT SIZE=2><A HREF="#toc_dg1841_1">ITEM 1(b). ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES</A></FONT><BR>
<FONT SIZE=2><A HREF="#toc_dg1841_2">ITEM 2(a). NAME OF PERSON FILING</A></FONT><BR>
<FONT SIZE=2><A HREF="#toc_dg1841_3">ITEM 2(b). ADDRESS OF PRINCIPAL BUSINESS OFFICE</A></FONT><BR>
<FONT SIZE=2><A HREF="#toc_dg1841_4">ITEM 2(c). CITIZENSHIP</A></FONT><BR>
<FONT SIZE=2><A HREF="#toc_dg1841_5">ITEM 2(d). TITLE OF CLASS OF SECURITIES</A></FONT><BR>
<FONT SIZE=2><A HREF="#toc_dg1841_6">ITEM 2(e). CUSIP Number</A></FONT><BR>
<FONT SIZE=2><A HREF="#toc_dg1841_7">ITEM 3. IF THIS STATEMENT IS FILED PURSUANT TO RULE 13d-1(b), or 13d-2(b) or (c) CHECK WHETHER THE PERSON FILING IS: One of the following</A></FONT><BR>
<FONT SIZE=2><A HREF="#toc_dg1841_8">ITEM 4. OWNERSHIP</A></FONT><BR>
<FONT SIZE=2><A HREF="#toc_dg1841_9">ITEM 5. OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS</A></FONT><BR>
<FONT SIZE=2><A HREF="#toc_dg1841_10">ITEM 6. OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON</A></FONT><BR>
<FONT SIZE=2><A HREF="#toc_dg1841_11">ITEM 7. IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY</A></FONT><BR>
<FONT SIZE=2><A HREF="#toc_dg1841_12">ITEM 8. IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF A GROUP</A></FONT><BR>
<FONT SIZE=2><A HREF="#toc_dg1841_13">ITEM 9. NOTICE OF DISSOLUTION OF GROUP</A></FONT><BR>
<FONT SIZE=2><A HREF="#toc_dg1841_14">ITEM 10. CERTIFICATION</A></FONT><BR>
<!-- SEQ=,FILE='QUICKLINK',USER=MCREED,SEQ=,EFW="2084844",CP="BIOTECHNOLOGY VALUE FUND, L.P.",DN="1" -->
<!-- TOCEXISTFLAG -->
</BODY>
</HTML>

</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-1
<SEQUENCE>3
<FILENAME>a2084844zex-1.htm
<DESCRIPTION>EXHIBIT 1
<TEXT>
<HTML>
<HEAD>
<TITLE>
</TITLE>
</HEAD>
<BODY BGCOLOR="#FFFFFF" LINK=BLUE  VLINK=PURPLE>
<BR>
<FONT SIZE=3 ><A HREF="#02BHL1841_2">QuickLinks</A></FONT>
<font size=3> -- Click here to rapidly navigate through this document</font>
<!-- TOC_END -->
<P ALIGN="RIGHT"><FONT SIZE=2><A
NAME="ka1841_exhibit_1"> </A>
<A NAME="toc_ka1841_1"> </A>
<BR></FONT><FONT SIZE=2><B>EXHIBIT 1    <BR>  </B></FONT></P>

<P ALIGN="CENTER"><FONT SIZE=2><A
NAME="ka1841_agreement_regarding_joint_filing"> </A>
<A NAME="toc_ka1841_2"> </A></FONT> <FONT SIZE=2><B>AGREEMENT REGARDING JOINT FILING    <BR>  </B></FONT></P>

<P><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The undersigned, Biotechnology Value Fund, L.P., a Delaware limited partnership, Biotechnology Value Fund II, L.P., a Delaware limited partnership, BVF
Investments, L.L.C., a Delaware limited liability company, BVF Partners L.P., a Delaware limited partnership, and BVF&nbsp;Inc., a Delaware corporation, hereby agree and acknowledge that the
information required by Schedule&nbsp;13G, to which this Agreement is attached as an exhibit, is filed on behalf of each of them. The undersigned further agree that any amendments or supplements
thereto shall also be filed on behalf of each of them. </FONT></P>

<!-- User-specified TAGGED TABLE -->
<TABLE WIDTH="100%" BORDER=0 CELLSPACING=0 CELLPADDING=0>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>Dated:&nbsp;&nbsp;July&nbsp;22, 2002</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD COLSPAN=4><FONT SIZE=2><B>BIOTECHNOLOGY VALUE FUND, L.P.</B></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>By:</FONT></TD>
<TD COLSPAN=3><FONT SIZE=2>BVF Partners L.P., its general partner</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>By:</FONT></TD>
<TD COLSPAN=2><FONT SIZE=2>BVF Inc., its general partner</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>By:</FONT></TD>
<TD WIDTH="42%"><FONT SIZE=2>/s/&nbsp;&nbsp;</FONT><FONT SIZE=2>MARK N. LAMPERT</FONT><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT><HR NOSHADE><FONT SIZE=2> Mark N. Lampert<BR>
President</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD COLSPAN=4><FONT SIZE=2><B>BIOTECHNOLOGY VALUE FUND II, L.P.</B></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>By:</FONT></TD>
<TD COLSPAN=3><FONT SIZE=2>BVF Partners L.P., its general partner</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>By:</FONT></TD>
<TD COLSPAN=2><FONT SIZE=2>BVF Inc., its general partner</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>By:</FONT></TD>
<TD WIDTH="42%"><FONT SIZE=2>/s/&nbsp;&nbsp;</FONT><FONT SIZE=2>MARK N. LAMPERT</FONT><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT><HR NOSHADE><FONT SIZE=2> Mark N. Lampert<BR>
President</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD COLSPAN=4><FONT SIZE=2><B>BVF INVESTMENTS, L.L.C.</B></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>By:</FONT></TD>
<TD COLSPAN=3><FONT SIZE=2>BVF Partners L.P., its manager</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>By:</FONT></TD>
<TD COLSPAN=2><FONT SIZE=2>BVF Inc., its general partner</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>By:</FONT></TD>
<TD WIDTH="42%"><FONT SIZE=2>/s/&nbsp;&nbsp;</FONT><FONT SIZE=2>MARK N. LAMPERT</FONT><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT><HR NOSHADE><FONT SIZE=2> Mark N. Lampert<BR>
President</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD COLSPAN=4><FONT SIZE=2><B>BVF PARTNERS L.P.</B></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>By:</FONT></TD>
<TD COLSPAN=3><FONT SIZE=2>BVF Inc., its general partner</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>By:</FONT></TD>
<TD COLSPAN=2><FONT SIZE=2>/s/&nbsp;&nbsp;</FONT><FONT SIZE=2>MARK N. LAMPERT</FONT><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT><HR NOSHADE><FONT SIZE=2> Mark N. Lampert<BR>
President</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD COLSPAN=4><FONT SIZE=2><B>BVF INC.</B></FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="42%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>By:</FONT></TD>
<TD COLSPAN=3><FONT SIZE=2>/s/&nbsp;&nbsp;</FONT><FONT SIZE=2>MARK N. LAMPERT</FONT><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT><HR NOSHADE><FONT SIZE=2> Mark N. Lampert<BR>
President</FONT></TD>
</TR>
</TABLE>
<!-- end of user-specified TAGGED TABLE -->

<HR NOSHADE>
<!-- ZEQ.=1,SEQ=1,EFW="2084844",CP="BIOTECHNOLOGY VALUE FUND, L.P.",DN="2",CHK=499685,FOLIO='blank',FILE='DISK044:[02BHL1.02BHL1841]KA1841A.;4',USER='PHENTGE',CD='20-JUL-2002;00:37' -->
<!-- THIS IS THE END OF A COMPOSITION COMPONENT -->
<BR>
<P><br><A NAME="02BHL1841_2">QuickLinks</A><br></P><!-- TOC_BEGIN -->
<FONT SIZE=2><A HREF="#toc_ka1841_1">EXHIBIT 1</A></FONT><BR>
<FONT SIZE=2><A HREF="#toc_ka1841_2">AGREEMENT REGARDING JOINT FILING</A></FONT><BR>
<!-- SEQ=,FILE='QUICKLINK',USER=MCREED,SEQ=,EFW="2084844",CP="BIOTECHNOLOGY VALUE FUND, L.P.",DN="2" -->
<!-- TOCEXISTFLAG -->
</BODY>
</HTML>

</TEXT>
</DOCUMENT>
</SUBMISSION>
