title: Two major groups of colicin factors: their evolutionary significance.
mesh_terms: D000483:Alleles; D005075:Biological Evolution; D002250:Carbon Radioisotopes; D002499:Centrifugation, Density Gradient; D002876:Chromosomes, Bacterial; D003087:Colicins / Q000032:analysis*; D003227:Conjugation, Genetic; D004269:DNA, Bacterial / Q000032:analysis; D004926:Escherichia coli; D005111:Extrachromosomal Inheritance; D008970:Molecular Weight; D009154:Mutation; D011995:Recombination, Genetic; D012486:Salmonella typhimurium; D013936:Thymidine; D014316:Tritium; D014465:Ultrasonics
chemical_list: D002250:Carbon Radioisotopes; D003087:Colicins; D004269:DNA, Bacterial; D014316:Tritium; D013936:Thymidine