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UV-A irradiation activates caspase3 in HCEnCi. (A) Western blot analysis of cleaved caspase3 and pro-caspase3 in HCEnCi cells. (B) Z-DEVD-rhodamine 110 fluorescence-based casapase3 activity assay. Results showed that activated caspase3 increases at 24 hours post 5, 10, and 25 J/cm2 as compared with no UV-A treatment.
