AKR murine leukemia virusLeukemia Virus, MurineMice, Inbred AKRMoloney murine leukemia virusAvian Sarcoma VirusesSarcoma Viruses, MurineFriend murine leukemia virusRNA, ViralGenes, ViralKirsten murine sarcoma virusLeukemia, ExperimentalAlpharetrovirusHarvey murine sarcoma virusHelper VirusesAbelson murine leukemia virusGenome, ViralBase SequenceDNA, ViralCell Transformation, ViralRNA-Directed DNA PolymeraseSarcomaLeukemia Virus, FelineVirus ReplicationGenomeRauscher VirusCell LineRetroviridae InfectionsMolecular Sequence DataRetroviridaeLeukemia Virus, BovineGammaretrovirusViral ProteinsRNA VirusesDefective VirusesNucleic Acid HybridizationSarcoma Viruses, FelineGenome, BacterialReceptors, VirusLeukemiaGene Products, gagMoloney murine sarcoma virusRous sarcoma virusAmino Acid SequenceVirus AssemblyVirus IntegrationMink Cell Focus-Inducing VirusesTumor Virus InfectionsProvirusesRepetitive Sequences, Nucleic AcidRecombination, GeneticVirionVirus CultivationSarcoma, ExperimentalGenetic VectorsOncogenic VirusesMice, Inbred StrainsRNAVaccinia virusSarcoma, AvianCell Transformation, NeoplasticTranscription, GeneticAntigens, ViralMinkViral Envelope ProteinsLeukemia, Myeloid, AcuteAvian leukosis virusCloning, MolecularMutationPhylogenyGene Expression Regulation, ViralLeukemia Virus, Gibbon ApeSpecies SpecificitySequence Analysis, DNA3T3 CellsGenome, HumanRetroviridae Proteins