AKR murine leukemia virusLeukemia Virus, MurineMice, Inbred AKRMoloney murine leukemia virusSimian virus 40Avian Sarcoma VirusesSarcoma Viruses, MurineFriend murine leukemia virusGenes, ViralKirsten murine sarcoma virusLeukemia, ExperimentalAlpharetrovirusCell Transformation, ViralHarvey murine sarcoma virusHelper VirusesDNA, ViralAbelson murine leukemia virusRNA, ViralVirus ReplicationLeukemia Virus, FelineSarcomaRNA-Directed DNA PolymeraseBase SequenceCell LineRauscher VirusRetroviridae InfectionsLeukemia Virus, BovineViral ProteinsRetroviridaeDefective VirusesReceptors, VirusRNA VirusesGammaretrovirusMolecular Sequence DataGenome, ViralSarcoma Viruses, FelineNucleic Acid HybridizationVirus CultivationLeukemiaVirus AssemblyGene Products, gagTumor Virus InfectionsVaccinia virusMoloney murine sarcoma virusRous sarcoma virusAntigens, ViralVirus IntegrationAmino Acid SequenceMink Cell Focus-Inducing VirusesProvirusesOncogenic VirusesRepetitive Sequences, Nucleic AcidCell Transformation, NeoplasticVirionGenetic VectorsRecombination, GeneticSarcoma, ExperimentalGenomeMice, Inbred StrainsAvian leukosis virusTranscription, GeneticSarcoma, AvianMinkAntigens, Viral, TumorGene Expression Regulation, ViralVirus SheddingPlant VirusesAntigens, Polyomavirus TransformingTransfectionHuman T-lymphotropic virus 1Leukemia, Myeloid, AcuteHaplorhiniLeukemia Virus, Gibbon ApeCells, CulturedViral Envelope Proteins3T3 CellsVirus DiseasesSindbis VirusDNA VirusesDNA Restriction EnzymesGene Products, envMutationSpecies SpecificityRetroviridae Proteins