Joint Filing AgreementJoint Filing Agreement • June 6th, 2011 • Biotechnology Value Fund L P • Investment advice
The undersigned hereby agree that the Statement on Schedule 13G dated June 6, 2011 with respect to the shares of Common Stock of Rigel Pharmaceuticals, Inc., and any further amendments thereto executed by each and any of the undersigned shall be filed on behalf of each of the undersigned pursuant to and in accordance with the provisions of Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended.
