title: The heritable nature of the factor in chicken cells which acts as a helper virus for Rous sarcoma virus.
mesh_terms: D000483:Alleles; D000818:Animals; D000941:Antigens / Q000032:analysis; D001358:Avian Sarcoma Viruses / Q000254:growth & development* / Q000472:pathogenicity; D001717:Birds; D002471:Cell Transformation, Neoplastic; D002478:Cells, Cultured / Q000276:immunology / Q000528:radiation effects; D002642:Chick Embryo; D003168:Complement Fixation Tests; D006224:Cricetinae; D046508:Culture Techniques; D005347:Fibroblasts; D005799:Genes, Dominant; D005827:Genetics, Microbial; D006378:Helper Viruses / Q000254:growth & development / Q000276:immunology / Q000472:pathogenicity; D007106:Immune Sera; D010222:Parainfluenza Virus 1, Human / Q000472:pathogenicity; D011830:Radiation Effects; D013045:Species Specificity; D014779:Virus Replication
chemical_list: D000941:Antigens; D007106:Immune Sera