title: Sex pili and the classification of sex factors in the enterobacteriaceae.
mesh_terms: D003090:Coliphages / Q000254:growth & development; D003227:Conjugation, Genetic; D004755:Enterobacteriaceae / Q000166:cytology*; D004926:Escherichia coli / Q000276:immunology; D005111:Extrachromosomal Inheritance; D008854:Microscopy, Electron; D012483:Salmonella Phages / Q000254:growth & development; D012486:Salmonella typhimurium / Q000276:immunology; D012723:Sex / Q000145:classification*