title: T4 gene 40 mutants. I. Isolation of new mutants.
mesh_terms: D003090:Coliphages / Q000235:genetics* / Q000378:metabolism; D005814:Genes, Viral; D009024:Morphogenesis; D009154:Mutation; D013696:Temperature; D014764:Viral Proteins / Q000235:genetics / Q000502:physiology*
chemical_list: D014764:Viral Proteins