Dynavax Technologies (DVAX) 10-Q 2006 Q2 Quarterly report

Exhibit 32.1

Certification Pursuant to Section 1350 of Chapter 63
of Title 18 of the United States Code

I, Dino Dina, M.D., hereby certify, pursuant to 18 U.S.C § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, in my capacity as an officer of Dynavax Technologies Corporation (the “Company”), that, to the best of my knowledge:

(i)	The Quarterly Report of the Company on Form 10-Q for the period ended June 30, 2006 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), fully complies with the requirements of section 13(a) or 15(d) of the Securities and Exchange Act of 1934; and
(ii)	The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: August 4, 2006	By:	/s/ DINO DINA, M.D.
		Dino Dina, M.D.
		President, Chief Executive Officer and Director (Principal Executive Officer)

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