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Effects of matrine on cell apoptosis. (a) Cell viability after exposure to matrine. (b–d) Cell apoptosis via flow cytometry: (b) control; (c) 10 μM matrine; (d) 100 μM matrine. Data are presented as mean ± SEM. The values having different superscript letters were significantly different with other groups (P < 0.05; n = 3 or 6).
