title: Isolation and characterization of Hfr males in Citrobacter freundii.
mesh_terms: D002874:Chromosome Mapping; D003227:Conjugation, Genetic; D003433:Crosses, Genetic; D004925:Escherichia / Q000145:classification / Q000302:isolation & purification* / Q000378:metabolism; D004926:Escherichia coli; D008040:Genetic Linkage; D007785:Lactose / Q000378:metabolism; D009153:Mutagens; D009154:Mutation; D011995:Recombination, Genetic
chemical_list: D009153:Mutagens; D007785:Lactose