AKR murine leukemia virusLeukemia Virus, MurineMice, Inbred AKRMoloney murine leukemia virusFriend murine leukemia virusLeukemia, ExperimentalAbelson murine leukemia virusLeukemia Virus, FelineRauscher VirusRetroviridae InfectionsLeukemia Virus, BovineVirus ReplicationCell LineReceptors, VirusLeukemiaRetroviridaeGenes, ViralDNA, ViralMolecular Sequence DataMink Cell Focus-Inducing VirusesRNA-Directed DNA PolymeraseTumor Virus InfectionsRNA VirusesProvirusesGene Products, gagRNA, ViralDefective Viruses