title: Effect on exclusion of alterations to the sex pilus.
abstract: Chromosomal genes from an Hfr donor, dependent for their transfer upon the integrated F factor, were not excluded by an F(+) recipient when the donor also carried an F-like R factor, and its sex pili contained, in addition to F pilin, another pilin of a different specificity.
mesh_terms: D000667:Ampicillin / Q000494:pharmacology; D002701:Chloramphenicol / Q000494:pharmacology; D002876:Chromosomes, Bacterial; D003227:Conjugation, Genetic; D003470:Culture Media; D004269:DNA, Bacterial; D004926:Escherichia coli / Q000187:drug effects / Q000254:growth & development; D005111:Extrachromosomal Inheritance; D005796:Genes; D007612:Kanamycin / Q000494:pharmacology; D010403:Penicillin Resistance; D011995:Recombination, Genetic; D013449:Sulfonamides / Q000494:pharmacology; D013752:Tetracycline / Q000494:pharmacology
chemical_list: D003470:Culture Media; D004269:DNA, Bacterial; D013449:Sulfonamides; D007612:Kanamycin; D002701:Chloramphenicol; D000667:Ampicillin; D013752:Tetracycline