title: A phage P1b function needed for DNA replication in a lytic cycle, but not in the prophage.
mesh_terms: D003090:Coliphages; D004261:DNA Replication; D004279:DNA, Viral; D006358:Hot Temperature; D008242:Lysogeny; D009154:Mutation; D012328:RNA Viruses; D014779:Virus Replication
chemical_list: D004279:DNA, Viral