Twenty-two patients with a peri-anal abscess or peri-anal fistula were studied selectively for the presence of HBsAg and anti-HBs. In 14 male and 8 female patients studied, the incidence of anti-HBs was 6 and of HBsAg 1. Positive findings occurred only in European male patients who invariably showed frequent homosexua
The rep protein of Escherichia coli, a helicase that unwinds duplex DNA at a replication fork (Kornberg, A., Scott, J. F., and Bertsch, L. L. (1978) J. Biol. Chem. 253, 3298-3304), forms binary complexes with ATP and with DNA, and ternary complexes with both. ATP (or dATP) is bound at a single site with a dissociation