title: A suggested mechanism for the selective procedure for isolating thymine-requiring mutants of Escherichia coli.
mesh_terms: D000900:Anti-Bacterial Agents / Q000494:pharmacology; D004926:Escherichia coli / Q000201:enzymology*; D008025:Ligases / Q000378:metabolism*; D008967:Molecular Biology; D009154:Mutation; D009711:Nucleotides; D013296:Streptococcus pneumoniae; D013762:Tetrahydrofolate Dehydrogenase / Q000378:metabolism; D013941:Thymine
chemical_list: D000900:Anti-Bacterial Agents; D009711:Nucleotides; D013762:Tetrahydrofolate Dehydrogenase; D008025:Ligases; D013941:Thymine