ProvirusesHIV InfectionsEndogenous RetrovirusesLeukemia Virus, MurineHIV SeropositivityDNA, ViralVirus IntegrationRetroviridaeGenes, ViralAKR murine leukemia virusMammary Tumor Virus, MouseTerminal Repeat SequencesBase SequenceMice, Inbred AKRRepetitive Sequences, Nucleic AcidHIV-1Reticuloendotheliosis virusMoloney murine leukemia virusRecombination, GeneticRetroviridae InfectionsAvian leukosis virusLeukemia Virus, FelineMolecular Sequence DataDNA Restriction EnzymesHIV SeroprevalenceDefective VirusesHelper VirusesHIV SeronegativityGenes, envLeukemia, ExperimentalGenes, polMink Cell Focus-Inducing VirusesAvian LeukosisRNA, ViralVirus ReplicationGenes, gagMice, Inbred StrainsThymus NeoplasmsCell LineCloning, MolecularLymphomaNucleic Acid HybridizationGene Products, gagVirus LatencyTranscription, GeneticCell Transformation, ViralGenetic VectorsAIDS SerodiagnosisLeukemia Virus, BovineHIV AntigensGene Expression Regulation, ViralGenome, ViralAnti-HIV AgentsThymomaAcquired Immunodeficiency SyndromeRetroviruses, SimianBlotting, SouthernTheropithecusSpumavirusHIV Protease InhibitorsOncogenesRetroviridae Proteins, OncogenicVirus ActivationRNA, Transfer, ProSexual BehaviorBetaretrovirusAmino Acid SequenceDNA, NeoplasmRestriction MappingGammaretrovirusMinkSequence Homology, Nucleic AcidHomosexuality, MaleEnzootic Bovine LeukosisKanamycin KinaseRNA-Directed DNA PolymerasePolymerase Chain ReactionTransfectionLymphoma, T-CellDeoxyribonuclease EcoRIRisk-TakingCD4 Lymphocyte CountVirionTumor Virus InfectionsViral Envelope ProteinsDNA, RecombinantPhylogenyAnti-Retroviral AgentsAvian Sarcoma VirusesHIV Core Protein p24Chromosome MappingHIV Reverse TranscriptaseSouth AfricaCatsHIV Envelope Protein gp120tat Gene Products, Human Immunodeficiency VirusCD4-Positive T-LymphocytesViral LoadDNA PrimersDeltaretrovirus