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The proliferating rates of SMMC7721 cells in response to BPDs 5 and 6 treatment. Different concentration of 5 (0.4 μg/mL or 1.23 μg/mL) and 6 (0.13 μg/mL or 0.4 μg/mL) were used to treat cells (A,B). At indicated time intervals, the proliferating rate of SMMC7721 cells were determined by MTT assay (n = 3). *, p <0.05 compared to non-treated controls.
