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FasL and UV activation of CASP3 with increasing duration of exposure. Cytoplasmic extracts from hTERT cells were analyzed for active CASP3 by immunoblotting after exposure to FasL (100 ng/ml) and UV light (100 mJ/cm2) at 0, 1, 12, 24, and 48 h. PDI was used as our loading control. These data are representative of three independent experiments (n = 3).
