title: Histidine regulatory mutants in Salmonella typhimurium. IV. A positive selection for polar histidine-requiring mutants from histidine operator constitutive mutants.
mesh_terms: D004794:Enzyme Repression; D005816:Genetic Complementation Test; D006639:Histidine / Q000378:metabolism*; D006867:Hydrolases / Q000378:metabolism; D007535:Isomerases / Q000378:metabolism; D008025:Ligases / Q000378:metabolism; D009154:Mutation; D010088:Oxidoreductases / Q000378:metabolism; D010744:Phosphoric Monoester Hydrolases / Q000378:metabolism; D011995:Recombination, Genetic; D012486:Salmonella typhimurium / Q000201:enzymology / Q000378:metabolism*; D012641:Selection, Genetic; D014166:Transferases / Q000378:metabolism
chemical_list: D006639:Histidine; D010088:Oxidoreductases; D014166:Transferases; D006867:Hydrolases; D010744:Phosphoric Monoester Hydrolases; D007535:Isomerases; D008025:Ligases