title: DNA synthesis during bacterial conjugation. II. Is DNA replication in the Hfr obligatory for chromosome transfer?
mesh_terms: D002247:Carbon Isotopes; D002499:Centrifugation, Density Gradient; D002876:Chromosomes, Bacterial; D003227:Conjugation, Genetic; D004261:DNA Replication; D004926:Escherichia coli / Q000378:metabolism*; D006358:Hot Temperature; D009587:Nitrogen Isotopes; D011995:Recombination, Genetic; D012723:Sex; D013217:Starvation; D013941:Thymine / Q000378:metabolism / Q000502:physiology; D014316:Tritium
chemical_list: D002247:Carbon Isotopes; D009587:Nitrogen Isotopes; D014316:Tritium; D013941:Thymine