ProvirusesEndogenous RetrovirusesLeukemia Virus, MurineDNA, ViralVirus IntegrationRetroviridaeGenes, ViralAKR murine leukemia virusMammary Tumor Virus, MouseTerminal Repeat SequencesBase SequenceMice, Inbred AKRRepetitive Sequences, Nucleic AcidReticuloendotheliosis virusMoloney murine leukemia virusRecombination, GeneticRetroviridae InfectionsAvian leukosis virusLeukemia Virus, FelineDNA Restriction EnzymesDefective VirusesHelper VirusesMolecular Sequence DataLeukemia, ExperimentalGenes, envGenes, polMink Cell Focus-Inducing VirusesAvian LeukosisMice, Inbred StrainsGenes, gagThymus NeoplasmsCloning, MolecularLymphomaNucleic Acid HybridizationVirus ReplicationRNA, ViralCell LineCell Transformation, ViralLeukemia Virus, BovineTranscription, GeneticHIV-1Genetic VectorsVirus LatencyThymomaGene Products, gagRetroviruses, SimianGenome, ViralBlotting, SouthernTheropithecusGene Expression Regulation, ViralSpumavirusOncogenesRetroviridae Proteins, OncogenicRNA, Transfer, ProBetaretrovirusDNA, NeoplasmRestriction MappingMinkGammaretrovirusEnzootic Bovine LeukosisKanamycin KinaseSequence Homology, Nucleic AcidVirus ActivationDeoxyribonuclease EcoRIAmino Acid SequenceLymphoma, T-CellTransfectionDNA, RecombinantTumor Virus InfectionsRNA-Directed DNA PolymeraseAvian Sarcoma VirusesViral Envelope ProteinsChromosome MappingVirionPolymerase Chain ReactionCatsPhylogenyDeltaretrovirusChickensPongo pygmaeusDNA PrimersProto-OncogenesHIV Long Terminal RepeatCrosses, GeneticXenotropic murine leukemia virus-related virusSequence DeletionHuman T-lymphotropic virus 1Viral Regulatory and Accessory ProteinsEnhancer Elements, GeneticMutationGene Products, envChromosome DeletionClone CellsGene Products, polSequence Analysis, DNASequence AlignmentChick EmbryoMammary Neoplasms, ExperimentalFriend murine leukemia virusGene Expression Regulation