AKR murine leukemia virusLeukemia Virus, MurineMice, Inbred AKRMoloney murine leukemia virusFriend murine leukemia virusLeukemia, ExperimentalAbelson murine leukemia virusLeukemia Virus, FelineRauscher VirusRetroviridae InfectionsNeoplasms, ExperimentalLeukemia Virus, BovineSarcoma, ExperimentalCell LineLeukemiaRetroviridaeMice, Inbred StrainsVirus ReplicationDNA, ViralMink Cell Focus-Inducing VirusesMice, Inbred BALB CGenes, ViralMolecular Sequence DataRNA-Directed DNA PolymeraseNeoplasm TransplantationReceptors, VirusFibrosarcomaBase SequenceTumor Virus InfectionsMice, Inbred C57BLTransplantation, IsogeneicProvirusesGene Products, gagLymphomaGammaretrovirusLeukemia, Myeloid, AcuteSpleenVirus IntegrationRNA, ViralLeukemia Virus, Gibbon Ape