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The viability of MDA-MB-231 cells with treatment of berberine in different concentration. After serum-starvation for 16 h, cells treated with berberine at the indicated concentration for 48 h in fresh serum-free media. (A) Berberine structure. (B) Cell viabilities were analyzed by MTT assay as described in Materials and Methods. These results were representative of three independent experiments. Values shown are means ± SEM. Con; control.
