Mutants of E. coli in which bacteriophage P4 cannot activate the late genes of its helper, bacteriophage P2.
D003090:Coliphages / Q000201:enzymology / Q000235:genetics* / Q000254:growth & development; D004789:Enzyme Activation; D004926:Escherichia coli / Q000235:genetics*; D005814:Genes, Viral; D006378:Helper Viruses / Q000201:enzymology / Q000235:genetics* / Q000254:growth & development; D008242:Lysogeny; D009113:Muramidase / Q000378:metabolism; D009154:Mutation; D012526:Satellite Viruses / Q000254:growth & development*; D014779:Virus Replication
D009113:Muramidase