title: Correlation between base sequence homology of RNA segment 4 and antigenicity of the hemagglutinin of influenza viruses.
mesh_terms: D001483:Base Sequence; D001669:Biochemical Phenomena; D001671:Biochemistry; D006389:Hemagglutinins, Viral / Q000032:analysis; D009980:Influenza A virus / Q000032:analysis / Q000276:immunology; D009693:Nucleic Acid Hybridization; D012367:RNA, Viral / Q000032:analysis*
chemical_list: D006389:Hemagglutinins, Viral; D012367:RNA, Viral