title: Replication of R-factors in Proteus mirabilis: replication under relaxed control.
mesh_terms: D002499:Centrifugation, Density Gradient; D002876:Chromosomes, Bacterial; D004261:DNA Replication; D004269:DNA, Bacterial / Q000096:biosynthesis; D004352:Drug Resistance, Microbial; D005111:Extrachromosomal Inheritance; D005827:Genetics, Microbial; D009584:Nitrogen; D011511:Proteus / Q000254:growth & development / Q000378:metabolism; D011868:Radioisotopes; D014498:Uracil
chemical_list: D004269:DNA, Bacterial; D011868:Radioisotopes; D014498:Uracil; D009584:Nitrogen