Fig. 6From: Characterization and mechanisms of anti-influenza virus metabolites isolated from the Vietnamese medicinal plant Polygonum chinense NA inhibition assay. The NA activity of influenza virus PR8 and rgPR8(H275Y) was measured in the presence of increasing concentrations of PC8 (a) or OSV-C (b). After addition of the NA-Fluor fluorescent substrate, enzymatic activity was measured by reading the fluorescence intensity with excitation at 350 nm and emission at 450 nm. The data shown are the means ± S.D. of three different samplesBack to article page