title: The a subunit in the RNA of transforming avian tumor viruses. I. Occurrence in different virus strains. II. Spontaneous loss resulting in nontransforming variants.
mesh_terms: D000818:Animals; D001358:Avian Sarcoma Viruses / Q000032:analysis* / Q000254:growth & development; D002471:Cell Transformation, Neoplastic; D002642:Chick Embryo; D046508:Culture Techniques; D004589:Electrophoresis, Disc; D005347:Fibroblasts; D014644:Genetic Variation; D005827:Genetics, Microbial; D006358:Hot Temperature; D008970:Molecular Weight; D009154:Mutation; D010759:Phosphorus Isotopes; D012367:RNA, Viral / Q000032:analysis*; D014316:Tritium; D014529:Uridine
chemical_list: D010759:Phosphorus Isotopes; D012367:RNA, Viral; D014316:Tritium; D014529:Uridine