[1] Geisel Sch Med Dartmouth, Dept Biochem, Hanover, NH 03755 USA
[2] Geisel Sch Med Dartmouth, Norris Cotton Canc Ctr, Hanover, NH 03755 USA
[3] Harvard Univ, Sch Med, Mt Auburn Hosp, Dept Internal Med, Cambridge, MA 02138 USA
[4] Virginia Tech, Dept Biol Sci, Blacksburg, VA 24061 USA
[5] Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USA
[6] Univ Virginia, Sch Med, Dept Biochem & Mol Genet, Charlottesville, VA 22908 USA
[7] Virginia Tech, Virginia Bioinformat Inst, Blacksburg, VA 24061 USA