Histidine regulatory mutants in Salmonella typhimurium. IV. A positive selection for polar histidine-requiring mutants from histidine operator constitutive mutants.

Enzyme Repression Genetic Complementation Test Histidine/metabolism Hydrolases/metabolism Isomerases/metabolism Ligases/metabolism Mutation Oxidoreductases/metabolism Phosphoric Monoester Hydrolases/metabolism Recombination, Genetic Salmonella typhimurium/enzymology,metabolism Selection, Genetic Transferases/metabolism

Histidine Oxidoreductases Transferases Hydrolases Phosphoric Monoester Hydrolases Isomerases Ligases