AKR murine leukemia virusLeukemia Virus, MurineMice, Inbred AKRMoloney murine leukemia virusFriend murine leukemia virusLeukemia, ExperimentalAbelson murine leukemia virusLeukemia Virus, FelineRauscher VirusRetroviridae InfectionsLeukemia Virus, BovineNeoplasms, ExperimentalSarcoma, ExperimentalLeukemiaCell LineRetroviridaeMice, Inbred StrainsVirus ReplicationMink Cell Focus-Inducing VirusesDNA, ViralGenes, ViralRNA-Directed DNA PolymeraseReceptors, VirusMolecular Sequence DataMice, Inbred BALB CNeoplasm TransplantationTumor Virus InfectionsBase SequenceFibrosarcomaProvirusesGene Products, gagTransplantation, IsogeneicGammaretrovirusLeukemia, Myeloid, AcuteLymphomaMice, Inbred C57BLVirus IntegrationSpleenLeukemia Virus, Gibbon ApeRNA, Viral