EXHIBIT 99.1

Certification

Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

(Subsections (a) and (b) of Section 1350, Chapter 63 of Title 18, United States Code)

Pursuant to section 906 of the Sarbanes-Oxley Act of 2002, (subsections (a) and (b) of section 1350, chapter 63 of title 18, United States Code), each of the undersigned officers of Variagenics, Inc., a Delaware corporation (the “Company”), does hereby certify, to such officer’s knowledge, that:

The Quarterly Report on Form 10-Q for the quarter ended June 30, 2002 (the “Form 10-Q”) of the Company fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, and the information contained in the Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: August 14, 2002	By: /s/ Joseph S. Mohr
	President and Chief Business Officer
	(principal executive officer)

Dated: August 14, 2002	By: /s/ Richard P. Shea
	Chief Operating Officer, Chief Financial Officer and Treasurer
	(principal financial officer)

The foregoing certification is being furnished solely pursuant to section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a) and (b) of section 1350, chapter 63 of title 18, United States Code) and is not being filed as part of a separate disclosure document.

Dated: August 14, 2002

By: /s/ Joseph S. Mohr

VARIAGENICS INC 10-Q