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Apoptosis of TPC-1 cells detected by DAPI staining. (a) The nontreated cells. (b) Cells were treated with 4 μg/mL harmine for 36 h. (c) Cells were treated with 8 μg/mL harmine for 36 h. (d) Cells were treated with 16 μg/mL harmine for 36 h.
