Exhibit 10.21 FORM OF GE WARRANT NEITHER THIS WARRANT NOR THE SECURITIES ISSUABLE UPON EXERCISE OF THIS WARRANT HAVE BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED. NO SALE OR DISPOSITION MAY BE EFFECTED EXCEPT IN COMPLIANCE WITH RULE...Warrant Agreement • June 14th, 2004 • Tolerrx Inc • Pharmaceutical preparations • Connecticut
