Myometrial CAT is a target for apoptotic CASP3 action. Cytoplasmic extracts from hTERT cells exposed to UV light (100 mJ/cm2) at 0, 1, 12, 24, and 48 h were analyzed by immunoblot for CAT, cleaved CAT, and active CASP3. PDI was used as our loading control. These data are representative of three independent experiments (n = 3).