[1] Inst Mol Sci, La Jolla, CA 92037 USA
[2] Univ Calif San Francisco, Dept Microbiol & Immunol, San Francisco, CA 94143 USA
[3] MIT, Dept Biol, Cambridge, MA 02139 USA
[4] Swiss Inst Expt Canc Res, ISREC, CH-1066 Epalinges, Switzerland
[5] Univ Geneva, Dept Mol Biol, CH-1211 Geneva 4, Switzerland
[6] Baylor Coll Med, Dept Mol & Human Genet, Houston, TX 77030 USA
[7] Univ Colorado, Dept Chem & Biochem, Howard Hughes Med Inst, Boulder, CO 80309 USA
[8] McMaster Univ, Dept Pathol, Canc Res Grp, Hamilton, ON L8N 3Z5, Canada
[9] Univ Texas, SW Med Ctr, Dept Neurosci & Cell Biol, Dallas, TX 75235 USA
[10] Texas A&M Univ, Dept Biochem & Biophys, College Stn, TX 77843 USA
[11] Geron Corp, Menlo Park, CA USA