<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>powerofattorney.txt
<DESCRIPTION>POWER OF ATTORNEY
<TEXT>

<PAGE>

                                POWER OF ATTORNEY

         KNOW ALL BY THESE PRESENTS, that the undersigned hereby constitutes and
appoints David Aviezer, Ph.D., MBA and Yossi Maimon the undersigned's true and
lawful attorney-in-fact to: (i) execute for and on behalf of the undersigned,
Forms 3, 4, and 5 in accordance with Section 16(a) of the Securities Exchange
Act of 1934, as amended and the rules thereunder in connection with the
undersigned's holdings of and transactions in securities issued by Protalix
BioTherapeutics, Inc., a Florida corporation (the "Company"); (ii) do and
perform any and all acts for and on behalf of the undersigned which may be
necessary or desirable to complete and execute any such Form 3, 4, or 5 and
timely file such form with the United States Securities and Exchange Commission
and any required stock exchange or similar authority, including the American
Stock Exchange and (iii) take any other action of any type whatsoever in
connection with the foregoing which, in the opinion of such attorney-in-fact,
may be of benefit to, in the best interest of, or legally required by, the
undersigned, it being understood that the documents executed by such
attorney-in-fact on behalf of the undersigned pursuant to this Power of Attorney
shall be in such form and shall contain such terms and conditions as such
attorney-in-fact may approve in such attorney-in-fact's discretion.

         The undersigned hereby grants to such attorney-in-fact full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary, or proper to be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as the undersigned might or
could do if personally present, with full power of substitution or revocation,
hereby ratifying and confirming all that such attorney-in-fact's substitute or
substitutes, shall lawfully do or cause to be done by virtue of this power of
attorney and the rights and powers herein granted. The undersigned acknowledges
that the foregoing attorney-in-fact, in serving in such capacity at the request
of the undersigned, is not assuming, nor is the Company assuming, any of the
undersigned's responsibilities to comply with Section 16 of the Securities
Exchange Act of 1934, as amended.

         This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file Forms 3, 4, and 5 with respect to the
undersigned's holdings of and transactions in securities issued by the Company,
unless earlier revoked by the undersigned in a signed writing delivered to the
foregoing attorney-in-fact.

         IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney
to be executed as of July 11, 2007.


                                                       /s/ Yodfat Harel Gross
                                                       -------------------------
                                                       Yodfat Harel Gross

</TEXT>
</DOCUMENT>
