title: Strain-specific antigen of the avian leukosis sarcoma virus group. I. Isolation and immunological characterization.
mesh_terms: D001355:Alpharetrovirus / Q000254:growth & development / Q000276:immunology* / Q000302:isolation & purification; D000818:Animals; D000941:Antigens / Q000302:isolation & purification*; D002499:Centrifugation, Density Gradient; D002645:Chickens; D046508:Culture Techniques; D005347:Fibroblasts; D007106:Immune Sera; D005779:Immunodiffusion; D011817:Rabbits; D013501:Surface-Active Agents; D014461:Ultracentrifugation
chemical_list: D000941:Antigens; D007106:Immune Sera; D013501:Surface-Active Agents