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Cytotoxicity of EGCG and Zn2+ on H9c2 cells determined by MTT assay. Viability of H9c2 cells following (A) treatment with various concentrations of EGCG (0–20 µM) and (B) treatment with various concentrations of Zn2+ (0–20 µM). Data are expressed as the mean ± standard deviation of a minimum of five experiments. *P<0.05 vs. control group; ▲P<0.01 vs. control group. EGCG, epigallocatechin-3-gallate.
