title: Studies on superinfection immunity among transmissible plasmids in Escherichia coli.
mesh_terms: D002247:Carbon Isotopes; D002499:Centrifugation, Density Gradient; D003227:Conjugation, Genetic; D004261:DNA Replication; D004269:DNA, Bacterial / Q000032:analysis / Q000096:biosynthesis; D004926:Escherichia coli / Q000032:analysis / Q000378:metabolism*; D005827:Genetics, Microbial; D005838:Genotype; D007700:Kinetics; D009154:Mutation; D013941:Thymine / Q000378:metabolism; D013997:Time Factors; D014316:Tritium
chemical_list: D002247:Carbon Isotopes; D004269:DNA, Bacterial; D014316:Tritium; D013941:Thymine