[1] UNIV MARBURG, INST MOLEK BIOL & TUMORFORSCH, EMIL MANKOPFF STR 1, D-3550 MARBURG, GERMANY
[2] KERNFORSCHUNGSZENTRUM KARLSRUHE GMBH, INST GENET & TOXIKOL, D-7500 KARLSRUHE 1, GERMANY
[3] UNIV CALIF SAN DIEGO, DEPT PHARMACOL, LA JOLLA, CA 92093 USA
[4] UNIV CALIF SAN DIEGO, CTR MOLEC GENET, LA JOLLA, CA 92093 USA
[5] UNIV CALIF SAN FRANCISCO, METAB RES UNIT, SAN FRANCISCO, CA 94143 USA