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Effect of digallic acid (DGA) on caspase-8 activity in TK6 cells. Lysates prepared from cells treated with the digallic acid for 24 h and 48 h were assayed for in vitro caspase-8 activity. The rate of cleavage of the caspase substrate DEVD-pNA was measured at 405 nm. The results are presented as the mean ± SD. The experiments were done in triplicate. (*) p < 0.05 means a significant difference between the untreated and treated cells. Control: cells were treated by the vehicle only.
