title: Conjugal type IV macromolecular transfer systems of Gram-negative bacteria: organismal distribution, structural constraints and evolutionary conclusions.
authors.affiliation: Department of Biology, University of California at San Diego, La Jolla, CA 92093-0116, USA.
authors.forename: T B
authors.initials: TB
authors.lastname: Cao
authors.forename: M H
authors.initials: MH
authors.lastname: Saier
mesh_terms: D001426:Bacterial Proteins / Q000235:genetics* / Q000378:metabolism; D003227:Conjugation, Genetic; D019143:Evolution, Molecular; D005798:Genes, Bacterial; D006090:Gram-Negative Bacteria / Q000145:classification / Q000235:genetics* / Q000472:pathogenicity; D005810:Multigene Family; D009698:Nucleoproteins / Q000378:metabolism; D010802:Phylogeny; D013045:Species Specificity; D037521:Virulence Factors
chemical_list: D001426:Bacterial Proteins; D009698:Nucleoproteins; D037521:Virulence Factors