AKR murine leukemia virusLeukemia Virus, MurineMice, Inbred AKRMoloney murine leukemia virusAvian Sarcoma VirusesRNA, ViralSarcoma Viruses, MurineGenome, ViralFriend murine leukemia virusGenes, ViralBase SequenceKirsten murine sarcoma virusLeukemia, ExperimentalDNA, ViralAlpharetrovirusVirus ReplicationHarvey murine sarcoma virusHelper VirusesRNA-Directed DNA PolymeraseAbelson murine leukemia virusCell Transformation, ViralMolecular Sequence DataSarcomaLeukemia Virus, FelineCell LineRauscher VirusGenomeViral ProteinsRetroviridae InfectionsRetroviridaeLeukemia Virus, BovineRNA VirusesGammaretrovirusDefective VirusesNucleic Acid HybridizationSarcoma Viruses, FelineVirionGenome, BacterialReceptors, VirusRNA, Transfer, LysGene Products, gagLeukemiaMoloney murine sarcoma virusVirus AssemblyRous sarcoma virusNucleic Acid ConformationAmino Acid SequenceTranscription, GeneticVirus IntegrationProvirusesMink Cell Focus-Inducing VirusesTumor Virus InfectionsMutationRepetitive Sequences, Nucleic AcidRecombination, GeneticHIV-1Virus CultivationSarcoma, ExperimentalGenetic VectorsRNAOncogenic VirusesMice, Inbred StrainsVaccinia virusAntigens, ViralCell Transformation, NeoplasticSarcoma, AvianMinkGene Expression Regulation, ViralAvian leukosis virusViral Envelope ProteinsCloning, MolecularLeukemia, Myeloid, AcutePhylogenySpecies SpecificityRNA ReplicasePlant VirusesLeukemia Virus, Gibbon ApeSequence Analysis, DNABinding Sites3T3 CellsRetroviridae ProteinsGenome, HumanTransfection