[1] UNIV MAINZ, INST PHYSIOL CHEM, ANGEW MOLEK BIOL ABT, DUESBERGWEG 6, W-6500 MAINZ, GERMANY
[2] RUDJER BOSKOVIC INST, CTR ORGAN CHEM & BIOCHEM, YU-41001 Zagreb, YUGOSLAVIA
[3] NATL CANC CTR, RES INST, DIV BIOPHYS, CHUO KU, TOKYO 104, JAPAN
[4] NATL CANC CTR, RES INST, DIV VIROL, CHUO KU, TOKYO 104, JAPAN