title: Proteolytic activation of the influenza virus hemagglutinin: The structure of the cleavage site and the enzymes involved in cleavage.
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D002642:Chick Embryo; D004591:Electrophoresis, Polyacrylamide Gel; D006388:Hemagglutinins; D009980:Influenza A virus / Q000276:immunology*; D007525:Isoelectric Focusing; D010447:Peptide Hydrolases / Q000378:metabolism; D014357:Trypsin / Q000378:metabolism
chemical_list: D006388:Hemagglutinins; D010447:Peptide Hydrolases; D014357:Trypsin