title: Enteric hybrids. II. S. typhimurium-E. coli hybrids for the trp-cysB-pyrF region.
mesh_terms: D002876:Chromosomes, Bacterial; D003434:Crossing Over, Genetic; D004926:Escherichia coli; D006824:Hybridization, Genetic; D011743:Pyrimidines / Q000378:metabolism; D012486:Salmonella typhimurium; D014161:Transduction, Genetic
chemical_list: D011743:Pyrimidines