title: Isolation of Salmonella typhimurium mutants with increased recipient ability by the use of R factor.
mesh_terms: D001435:Bacteriophages; D003090:Coliphages; D004247:DNA / Q000096:biosynthesis; D004926:Escherichia coli; D009154:Mutation; D011995:Recombination, Genetic; D012486:Salmonella typhimurium / Q000302:isolation & purification*; D014170:Transformation, Genetic
chemical_list: D004247:DNA