Fig. 4From: Characterization of the anti-Staphylococcus aureus fraction from Penthorum chinense Pursh stemsInfluence of the PGF and S3 on cell viability. The PGF decreased cell viability in a dose-dependent manner, as shown by the MTT assay. NCTC 1469 cells were incubated with increasing concentrations of the PGF or S3 for 18 h. * * P < 0.01 vs. UT (0 μg/mL). UT indicates an untreated controlBack to article page