title: Antigenic characterization of infectious bronchitis virus.
mesh_terms: D000818:Animals; D000941:Antigens / Q000032:analysis*; D002499:Centrifugation, Density Gradient; D002642:Chick Embryo; D005019:Ethyl Ethers / Q000494:pharmacology; D005374:Filtration; D005779:Immunodiffusion; D010434:Pepsin A / Q000494:pharmacology; D012328:RNA Viruses / Q000276:immunology*; D014357:Trypsin / Q000494:pharmacology; D014776:Virus Cultivation
chemical_list: D000941:Antigens; D005019:Ethyl Ethers; D014357:Trypsin; D010434:Pepsin A