title: Biotin-transducing lambda phages with unusual att regions.
mesh_terms: D002247:Carbon Isotopes; D002499:Centrifugation, Density Gradient; D003090:Coliphages / Q000528:radiation effects; D004926:Escherichia coli; D009154:Mutation; D011830:Radiation Effects; D011995:Recombination, Genetic; D013936:Thymidine / Q000378:metabolism; D014161:Transduction, Genetic; D014316:Tritium; D014466:Ultraviolet Rays
chemical_list: D002247:Carbon Isotopes; D014316:Tritium; D013936:Thymidine