Figure 3: Effect of AEL on caspase activation in MCF-7 cells. Caspases-3, -8, and -9 activities were determined by enzyme activity assays using Ac-DEVD-pNA, Ac-LEHD-pNA, and Ac-IETD-pNA enzyme substrate, respectively (A, B, and C). Data values are expressed as mean ± SD of triplicate determinations. Significant differences were compared with the control at *p<0.05, **p<0.01, and ***p<0.001 by Student’s t-tests.