title: Bacterial chromosomal restriction endonuclease analysis of the homology of Bacteroides species.
abstract: Chromosomal DNAs of selected Bacteroides organisms whose relatedness had been previously determined by "conventional" filter-annealing studies (J. L. Johnson, Int. J. Syst. Bacteriol. 28:245, 1978) were further analyzed by restriction endonuclease analysis coupled with the Southern hybridization procedure (E. M. Southern, J. Mol. Biol. 98:503, 1975). By comparing their EcoRI restriction fragment patterns in agarose gel electrophoresis, each Bacteroides strain could be clearly differentiated. As a simple and direct means for comparison purposes this method was particularly useful for differentiating genetically similar organisms such as Bacteroides strains of the same species which shared greater than 75% homology. In contrast, bacterial chromosomal restriction endonuclease analysis in conjunction with Southern hybridizations was most effectively used to determine the significance of low levels of homology (less than 24%) as this technique provided additional information on the nature and relative distribution of that homology when the areas of homology were displayed as reproducible bands in autoradiograms.
authors.forename: W C
authors.initials: WC
authors.lastname: Bradbury
authors.forename: R G
authors.initials: RG
authors.lastname: Murray
authors.forename: C
authors.initials: C
authors.lastname: Mancini
authors.forename: V L
authors.initials: VL
authors.lastname: Morris
mesh_terms: D001439:Bacteroides / Q000145:classification / Q000235:genetics* / Q000648:ultrastructure; D001441:Bacteroides fragilis / Q000235:genetics / Q000648:ultrastructure; D002876:Chromosomes, Bacterial / Q000648:ultrastructure; D004262:DNA Restriction Enzymes; D004269:DNA, Bacterial / Q000235:genetics* / Q000302:isolation & purification; D004587:Electrophoresis, Agar Gel; D009693:Nucleic Acid Hybridization
chemical_list: D004269:DNA, Bacterial; D004262:DNA Restriction Enzymes