title: Formation of recombinants in Escherichia coli and a gene controlling the expression of a donor marker.
mesh_terms: D002247:Carbon Isotopes; D002876:Chromosomes, Bacterial; D003433:Crosses, Genetic; D004269:DNA, Bacterial; D004926:Escherichia coli; D005696:Galactosidases / Q000096:biosynthesis; D005809:Genes, Regulator; D009154:Mutation; D011995:Recombination, Genetic; D013936:Thymidine / Q000378:metabolism
chemical_list: D002247:Carbon Isotopes; D004269:DNA, Bacterial; D005696:Galactosidases; D013936:Thymidine