<DOCUMENT>
<TYPE>EX-10
<SEQUENCE>4
<FILENAME>oct262005sb2aex1017.txt
<TEXT>
Exhibit 10.17


                           Applied DNA Sciences, Inc.
                       9229 W. Sunset Boulevard, Suite 830
                          Los Angeles, California 90069

                                              October 20, 2005

Biowell Technology Inc.
18F, No. 959 Chung-Cheng Rd.
Chung-Ho City
Taipei County
Taiwan 235
ROC

         Re:    Amended License Agreement
                -------------------------

Dr. Jun-Jei Sheu:

     As referenced in the Exclusive  Licensing  Agreement,  dated as of July 12,
2005 (the "Agreement"), Applied DNA Sciences, Inc. and APDN (B.V.I.) Inc. hereby
agree to amend the Agreement to add a section 1.11 which shall read as follows:

     1.11 Notwithstanding  anything to the foregoing,  in the event that, during
     the term of the Agreement,  any Biowell Territory is identified by the U.S.
     State  Department as a state sponsor of terrorism or is subject to economic
     sanctions  administered by the U.S. Treasury Department's Office of Foreign
     Assets  Control  (a  "Sanctioned  Territory"),  Biowell  shall not have any
     contact, direct or indirect, with such Sanctioned Territory until such time
     as the  Sanctioned  Territory  is no longer  identified  by the U.S.  State
     Department  as a state  sponsor of terrorism and is not subject to economic
     sanctions  administered by the U.S. Treasury Department's Office of Foreign
     Assets  Control.  In  addition,  in the event  that any  Biowell  Territory
     becomes a Sanctioned Territory,  all sections of this Agreement,  including
     minimum  royalty  fees,  relating to such  Sanctioned  Territory,  shall be
     suspended while such Biowell Territory remains a Sanctioned Territory.



<PAGE>



         If this proposed amendment is acceptable to you, please execute below.

                                         Very truly yours,

                                         APPLIED DNA SCIENCES, INC.


                                         By:  /s/ PETER BROCKLESBY
                                              Peter Brocklesby
                                              President

                                         By:  /s/ JAMES HAYWARD
                                              -----------------
                                              James Hayward
                                              Chief Executive Officer

                                         APDN (B.V.I.) INC.


                                         By:  /s/ PETER BROCKLESBY
                                              ---------------------
                                              Peter Brocklesby
                                              President

Agreed to and Accepted:

BIOWELL TECHNOLOGY INC.


By: /s/ JUN-JEI SHEU
   -----------------
   Jun-Jei Sheu
   Chairman
   Dated:  October 20, 2005



</TEXT>
</DOCUMENT>
