title: Replication defective, transforming virus of strain R avian erythroblastosis virus.
mesh_terms: D001355:Alpharetrovirus / Q000235:genetics*; D000818:Animals; D001354:Avian Leukosis Virus / Q000235:genetics*; D002472:Cell Transformation, Viral; D002642:Chick Embryo; D012367:RNA, Viral / Q000032:analysis; D014779:Virus Replication
chemical_list: D012367:RNA, Viral