[1] MIT,CTR CANC RES,CAMBRIDGE,MA 02139
[2] MIT,DEPT BIOL,CAMBRIDGE,MA 02139
[3] WHITEHEAD INST BIOMED RES,CAMBRIDGE,MA 02142
[4] UNIV CALIF SAN DIEGO,SCH MED,CTR MOLEC GENET,EUKARYOT REGULATORY BIOL PROGRAM,SAN DIEGO,CA 92093
[5] MASSACHUSETTS GEN HOSP,DEPT MOLEC BIOL,BOSTON,MA 02114
[6] MIT,DEPT BIOL,HOWARD HUGHES MED INST,CAMBRIDGE,MA 02139