[1] RIKEN,INST PHYS & CHEM RES,GENE BANK,TSUKUBA,IBARAKI 305,JAPAN
[2] KEIO UNIV,SCH MED,DEPT MOLEC BIOL,SHINJUKU KU,TOKYO 160,JAPAN
[3] ROSWELL PK CANC INST,BUFFALO,NY 14263
[4] UNIV LONDON,SCH PHARM,CTR APPL MOLEC BIOL,LONDON WC1N 1AX,ENGLAND
[5] IMPERIAL CANC RES FUND,LONDON WC2A 3PX,ENGLAND