title: Production of thymineless mutants in gram-negative bacteria (Aerobacter, Proteus).
mesh_terms: D000630:Aminopterin / Q000494:pharmacology*; D004492:Edetic Acid / Q000494:pharmacology; D004754:Enterobacter / Q000187:drug effects*; D004926:Escherichia coli / Q000187:drug effects*; D009153:Mutagens / Q000494:pharmacology*; D011511:Proteus / Q000187:drug effects*; D013941:Thymine / Q000378:metabolism*
chemical_list: D009153:Mutagens; D004492:Edetic Acid; D000630:Aminopterin; D013941:Thymine