EXHIBIT 24



POWER OF ATTORNEY

For Executing Forms 3, 4 and 5



Know all by these presents, that the undersigned hereby constitutes and

appoints each of John B. Green, Daniel S. Woloshen, Nathaniel S. Gardiner,

Brian P. Keane and Marianne Staniunas, each acting singly, his true and

lawful attorney-in-fact from the date hereof to:



(1) Execute for and on behalf of the undersigned, in the

undersigned's capacity as an officer, director and/or 10% shareholder of

GTC Biotherapeutics, Inc. (the "Company"), forms and authentication

documents for EDGAR Filing Access;



(2)  execute for and on behalf of the undersigned, in the undersigned's

capacity as an officer, director and/or 10% shareholder of the Company,

Forms 3, 4 and 5 in accordance with Section 16(a) of the Securities

Exchange Act of 1934 and the rules thereunder;



(3) do and perform any and all acts for and on behalf of the undersigned

that may be necessary or desirable to complete the execution of any such Form

3, 4 or 5, complete and execute any amendment or amendmentes thereto, and

the timely filing of such form with the United States Securities and Exchange

Commission and any other authority; and



(4) 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 interests 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 his discretion.



The undersigned hereby grants to each such attorney-in-fact full power and

authority to do and perform all and every act and thing whatsoever requisite,

necessary, and proper to be done in the exercise of any of the rights and

powers herein granted, as fully for all intents and purposes as the such

attorney-in-fact might or could do if personally present, with full power of

substitution or revocation, hereby ratifying and confirming all that such

attorney-in-fact, or his 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

attorneys-in-fact, in serving in such capacity at the request of the

undersigned, are not 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 attorneys-in-fact.



IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to

be executed this 14TH day of September, 2007.



/s/ Christian Bechon

Christian Bechon