Avian leukosis virusAlpharetrovirusAvian Sarcoma VirusesAvian LeukosisChickensSarcoma, AvianSarcomaAvian ProteinsChick EmbryoReceptors, VirusQuailBursa of FabriciusCell Transformation, ViralPoultry DiseasesReticuloendotheliosis virusGenes, ViralSarcoma, EwingDefective VirusesDNA, ViralEnzootic Bovine LeukosisRNA, ViralVirus ReplicationCoturnixSarcoma, KaposiSarcoma, ExperimentalAvian myeloblastosis virusSarcoma, SynovialMolecular Sequence DataViral ProteinsCell LineBase SequenceRNA-Directed DNA PolymeraseCell Transformation, NeoplasticRetroviridae ProteinsRetroviridaeAmino Acid SequenceGenes, gagVirus IntegrationRNA VirusesCulture TechniquesSarcoma 180Helper VirusesMarek DiseaseRepetitive Sequences, Nucleic AcidNucleic Acid HybridizationRecombination, GeneticFibroblastsSarcoma Viruses, MurineGene Products, gagOncogenesOncogene Protein pp60(v-src)Antigens, ViralGene Products, envGenes, polVaccinia virusProviruses