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Cells were treated with pemetrexed (20 μM), cisplatin (40 μM), or cSBL (1 μM) for 72 h. (A) Cleaved (activated) caspase-3 was detected using western blot analysis. (B) Caspase-3 activity was analyzed using a Caspase-Glo™ 3/7 assay. *p < 0.05; n.s.: not significant.
