title: Evidence for the possible existence of two envelope antigenic determinants and corresponding cell receptors for avian tumor viruses.
mesh_terms: D001355:Alpharetrovirus / Q000276:immunology*; D000818:Animals; D000941:Antigens / Q000032:analysis*; D001358:Avian Sarcoma Viruses / Q000276:immunology*; D001665:Binding Sites; D002645:Chickens; D046508:Culture Techniques; D009500:Neutralization Tests; D014762:Viral Interference
chemical_list: D000941:Antigens