Leukemia Virus, MurineMoloney murine leukemia virusLeukemia Virus, FelineLeukemia Virus, BovineEndogenous RetrovirusesLeukemiaRetroviridaeFriend murine leukemia virusLeukemia, ExperimentalAKR murine leukemia virusRetroviridae InfectionsLeukemia, Myeloid, AcuteHuman T-lymphotropic virus 1Virus ReplicationCell LineReceptors, VirusMolecular Sequence DataLeukemia Virus, Gibbon ApeAbelson murine leukemia virusGenes, ViralProvirusesRauscher VirusDNA, ViralLeukemia, Lymphocytic, Chronic, B-CellRNA VirusesGene Products, taxBase SequenceGene Products, gagRNA, ViralLeukemia, LymphoidVirus IntegrationRNA-Directed DNA PolymeraseGammaretrovirusVirus AssemblyTerminal Repeat SequencesViral ProteinsDefective VirusesAmino Acid SequenceEnzootic Bovine LeukosisTumor Virus InfectionsVirus CultivationVaccinia virusCell Transformation, ViralGenetic VectorsLeukemia, Myelogenous, Chronic, BCR-ABL PositiveVirionRepetitive Sequences, Nucleic AcidGene Products, envDeltaretrovirusRetroviridae ProteinsAvian leukosis virusGene Expression Regulation, ViralMice, Inbred AKRLeukemia, T-CellRetroviridae Proteins, OncogenicAntigens, ViralSarcoma Viruses, MurineHuman T-lymphotropic virus 2Genes, envRetroviruses, SimianViral Envelope ProteinsGenes, gagSimian virus 40TransfectionGenes, polOncogenic VirusesVirus SheddingRecombination, GeneticTranscription, GeneticSpumavirusHylobatesCells, CulturedMice, Inbred StrainsAvian Sarcoma VirusesVirus DiseasesMink Cell Focus-Inducing VirusesLeukemia-Lymphoma, Adult T-CellPrecursor Cell Lymphoblastic Leukemia-LymphomaPolymerase Chain ReactionDNA VirusesGene Products, rexDeltaretrovirus InfectionsSpecies SpecificityRadiation Leukemia Virus3T3 CellsLeukemia, FelineT-LymphocytesCatsPlant VirusesHTLV-I InfectionsHIV-1LymphomaSindbis VirusHelper VirusesGenes, pXVirus ActivationMeasles virusPhylogenyCloning, MolecularCell Transformation, Neoplastic