AKR murine leukemia virusLeukemia Virus, MurineMice, Inbred AKRLeukemia, ExperimentalMoloney murine leukemia virusFriend murine leukemia virusAbelson murine leukemia virusLeukemiaLeukemia Virus, FelineRauscher VirusLeukemia Virus, BovineRetroviridae InfectionsLeukemia, Myeloid, AcuteCell LineRetroviridaeAntibodiesVirus ReplicationMink Cell Focus-Inducing VirusesDNA, ViralMolecular Sequence DataGenes, ViralRNA-Directed DNA PolymeraseLeukemia, Lymphocytic, Chronic, B-CellReceptors, VirusBase SequenceLeukemia, LymphoidProvirusesGene Products, gagMice, Inbred StrainsTumor Virus InfectionsGammaretrovirusAntibodies, ViralLeukemia Virus, Gibbon ApeVirus IntegrationRNA, ViralViral ProteinsPreleukemiaAntibody SpecificityViral Envelope Proteins