title: Enhancement of the infectivity of influenza A and B viruses by proteolytic cleavage of the hemagglutinin polypeptide.
mesh_terms: D002460:Cell Line; D002918:Chymotrypsin / Q000378:metabolism; D005341:Fibrinolysin / Q000378:metabolism; D006389:Hemagglutinins, Viral; D009975:Orthomyxoviridae / Q000254:growth & development / Q000378:metabolism / Q000472:pathogenicity*; D010455:Peptides / Q000378:metabolism*; D010958:Plasminogen / Q000378:metabolism; D014357:Trypsin / Q000378:metabolism; D014764:Viral Proteins / Q000378:metabolism*; D014774:Virulence; D014779:Virus Replication
chemical_list: D006389:Hemagglutinins, Viral; D010455:Peptides; D014764:Viral Proteins; D010958:Plasminogen; D002918:Chymotrypsin; D014357:Trypsin; D005341:Fibrinolysin