title: Internal organization of endogenous proviral DNAs of xenotropic murine leukemia viruses.
abstract: The internal organization of endogenous xenotropic murine leukemia virus proviruses was determined in a series of blot hybridization experiments in which DNA from several different inbred mouse strains, digested with restriction enzymes known to cleave xenotropic proviral DNAs at least twice, was annealed to generalized murine leukemia virus or xenotropic env-specific DNA probes. Comigrating bands of variable intensity which hybridized to the xenotropic env probe were identified in all inbred mouse DNA preparations. At least seven classes of endogenous xenotropic proviral DNA with respect to SacI cleavage maps were detected in mouse DNA. Two of the seven classes were indistinguishable from proviruses associated with known infectious xenotropic murine leukemia viruses. These results are consistent with the existence of related but organizationally distinct families of endogenous xenotropic proviral DNA that are present in different relative abundances in mouse genomic DNA.
mesh_terms: D000818:Animals; D001426:Bacterial Proteins; D001483:Base Sequence; D004262:DNA Restriction Enzymes; D004279:DNA, Viral; D015246:Deoxyribonuclease EcoRI; D015252:Deoxyribonucleases, Type II Site-Specific; D005814:Genes, Viral; D009052:Leukemia Virus, Murine / Q000235:genetics*; D051379:Mice; D008815:Mice, Inbred Strains / Q000382:microbiology*; D009693:Nucleic Acid Hybridization; D011995:Recombination, Genetic
chemical_list: D001426:Bacterial Proteins; D004279:DNA, Viral; D004262:DNA Restriction Enzymes; D015246:Deoxyribonuclease EcoRI; C024408:endodeoxyribonuclease SacI; C024404:BglII endonuclease; C024388:CTGCAG-specific type II deoxyribonucleases; D015252:Deoxyribonucleases, Type II Site-Specific