title: Evidence from studies with a cross-linking reagent that the haemagglutinin of influenza virus is a trimer.
mesh_terms: D001963:Bromelains / Q000494:pharmacology; D055598:Chemical Phenomena; D002621:Chemistry; D004120:Dimethyl Suberimidate / Q000494:pharmacology; D004220:Disulfides / Q000494:pharmacology; D006389:Hemagglutinins, Viral / Q000032:analysis; D007094:Imides / Q000494:pharmacology; D007202:Indicators and Reagents; D008970:Molecular Weight; D009975:Orthomyxoviridae / Q000276:immunology*
chemical_list: D004220:Disulfides; D006389:Hemagglutinins, Viral; D007094:Imides; D007202:Indicators and Reagents; D004120:Dimethyl Suberimidate; D001963:Bromelains