[1] VET ADM MED CTR,DIV MOLEC BIOL,SAN FRANCISCO,CA 94121
[2] UNIV ARIZONA,DEPT BIOCHEM,TUCSON,AZ 85721
[3] UNIV CALIF SAN FRANCISCO,DEPT BIOCHEM & BIOPHYS,SAN FRANCISCO,CA 94143
[4] UNIV CALIF SAN FRANCISCO,DEPT PHARMACEUT CHEM,SAN FRANCISCO,CA 94143