title: Tandem duplications of the histidine operon observed following generalized transduction in Salmonella typhimurium.
mesh_terms: D002874:Chromosome Mapping; D003433:Crosses, Genetic; D004171:Diploidy; D005787:Gene Frequency; D006238:Haploidy; D006639:Histidine / Q000096:biosynthesis*; D009154:Mutation; D009876:Operon; D011995:Recombination, Genetic; D012483:Salmonella Phages / Q000378:metabolism; D012486:Salmonella typhimurium / Q000378:metabolism*; D014161:Transduction, Genetic
chemical_list: D006639:Histidine