lysis of liposomes required the presence of the two viral envelope glycoproteins , namely the hemagglutinin/neuraminidase ( hn ) and the fusion ( f ) polypeptides , and was inhibited by phenylmethyl sulfonylfluoride ( pmsf ) , dithiothreitol ( dtt ) and trypsin , showing that virus-induced lysis of pc/chol/gangl/gp liposomes reflects the fusogenic activity of the virus .
C2985502
hemagglutinin/neuraminidase
C0042776
virus