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Effect of pandurartin A on caspases activation. Fold increase of the levels of (A) caspase-3 and (B) caspase-8 in A549 cells treated with various concentrations of PA, compared to vehicle control. The fluorescence intensity was measured at excitation wavelength of 390 nm and emission wavelength of 500 nm. The increase of protease activities was determined by comparing the levels in PA-treated A549 cells with the vehicle control.
