Leukemia Virus, BovineEnzootic Bovine LeukosisCattle DiseasesCattleLeukemia Virus, MurineAvian LeukosisMoloney murine leukemia virusAvian leukosis virusLymphocytosisRauscher VirusGenes, ViralLeukemiaRetroviridaeBase SequenceLeukemia Virus, FelineLeukemia, ExperimentalGenome, ViralDNA, ViralMolecular Sequence DataSheepProvirusesRNA, ViralGene Products, taxSheep DiseasesImmunodeficiency Virus, BovineCell LineVirus ReplicationGenes, pXHuman T-lymphotropic virus 1GenomeFriend murine leukemia virusRetroviridae Proteins, OncogenicAntibodies, ViralDeltaretrovirusViral ProteinsAmino Acid SequenceAKR murine leukemia virusRepetitive Sequences, Nucleic Acid