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Cell viability of HepG2 cells treated with PBPs. (a) HepG2 cells were treated with PBPs at 62.5, 125, 250, and 500 μg/mL for 6 h, 12 h, and 24 h, respectively (∗P < 0.05/∗∗P < 0.01 versus control); (b) flow cytometry analysis of apoptosis of HepG2 cells after PBPs treatment; (c) the effect of PBPs on apoptotic ratio in HepG2 cells (∗P < 0.05/∗∗P < 0.01/∗∗∗P < 0.001 versus control).
