Avalon Pharmaceuticals (AVRX) 10-Q 2007 Q2 Quarterly report

Exhibit 32.1

Written Statement of Chief Executive Officer and Chief Financial Officer
Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

The undersigned, the Chief Executive Officer and the Chief Financial Officer of Avalon Pharmaceuticals, Inc. (the “Company”), each hereby certifies that, to his knowledge on the date hereof:

(a)	The Form 10-Q of the Company for the quarter ended June 30, 2007 filed on the date hereof with the Securities and Exchange Commission (the “Report”) fully complies with the requirements of Section 13(a) and 15(d) of the Securities Exchange Act of 1934; and
(b)	Information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

August 9, 2007	/s/ Kenneth C. Carter
	Kenneth C. Carter, Ph.D.
	President and Chief Executive Officer
	/s/ C. Eric Winzer
	C. Eric Winzer
	Executive Vice President and Chief Financial Officer