Exhibit 99.2

Certification Pursuant to 18 U.S.C. §1350, as Adopted,
Pursuant to §906 of the Sarbanes-Oxley Act of 2002

I, Janet L. Nibel, Vice President of Finance and Administration of Sangamo BioSciences, Inc. (the “Company”), certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that:

(1) the Quarterly Report of the Company on Form 10-Q for the quarterly period ending  March 31, 2003, as filed with the Securities and Exchange Commission (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) the information contained in the Report fairly presents, in all material respects, the financial condition and result of operations of the Company.

/s/ Janet L. Nibel
Janet L. Nibel
Vice President Finance and Administration
(Principal Financial Officer)
Date:	May 15, 2003