title: Envelope protein of influenza virus. II. Antigenicity.
mesh_terms: D000818:Animals; D000941:Antigens / Q000302:isolation & purification*; D002623:Chemistry Techniques, Analytical; D006385:Hemagglutination Inhibition Tests; D006386:Hemagglutination Tests; D006389:Hemagglutinins, Viral / Q000302:isolation & purification; D007252:Influenza Vaccines / Q000494:pharmacology; D009975:Orthomyxoviridae / Q000276:immunology*; D009976:Orthomyxoviridae Infections / Q000276:immunology; D014461:Ultracentrifugation; D014764:Viral Proteins / Q000302:isolation & purification*
chemical_list: D000941:Antigens; D006389:Hemagglutinins, Viral; D007252:Influenza Vaccines; D014764:Viral Proteins