title: A histidine operator-constitutive mutation decreases the frequency of recombination within the histidine operon of Salmonella typhimurium.
mesh_terms: D006639:Histidine / Q000378:metabolism; D008722:Methods; D009154:Mutation; D009876:Operon; D011995:Recombination, Genetic; D012483:Salmonella Phages; D012486:Salmonella typhimurium; D014161:Transduction, Genetic
chemical_list: D006639:Histidine