Biotechnology Value Fund, L.P. Calls Special Meeting of Avigen Stockholders To Remove Incumbent Directors and Elect Slate of Stockholder-Focuse...(Stock of Avigen. As the general p...)

As the general partner of BVF and BVF2, the manager of BVLLC and the investment adviser of ILL10, Partners may be deemed to beneficially own the 8,819,600 shares of Common Stock of Avigen beneficially owned in the aggregate by BVF, BVF2, BVLLC and ILL10. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the 8,819,600 shares of Common Stock of Avigen beneficially owned by Partners. Mr. Lampert, as a director and officer of BVF Inc. may be deemed to beneficially own the 8,819,600 shares of Common Stock of Avigen beneficially owned by BFV Inc.

None of Messrs. Nodelman, Perry or Coppedge directly owns any shares of Common Stock of Avigen. As a members of a "group" for the purposes of Rule 13d-5(b)(1) of the Securities Exchange Act of 1934, as amended, each of Messrs. Nodelman, Perry and Coppedge may be deemed to beneficially own the 8,819,600 shares of Common Stock of Avigen beneficially owned in the aggregate by the other participants named herein. Each of Messrs. Nodelman, Perry and Coppedge disclaims beneficial ownership of such shares of Common Stock.