title: Mutants of bacteriophage T4 unable to induce dihydrofolate reductase activity.
mesh_terms: D003090:Coliphages / Q000254:growth & development*; D004790:Enzyme Induction; D004794:Enzyme Repression; D004926:Escherichia coli / Q000201:enzymology*; D009154:Mutation; D010641:Phenotype; D013762:Tetrahydrofolate Dehydrogenase / Q000096:biosynthesis*
chemical_list: D013762:Tetrahydrofolate Dehydrogenase