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Protection of HCLE cells from UVB-induced apoptosis by Ba2+. Cells were exposed to 150 mJ/cm2 UVB, incubated for 6 hours and analyzed by the TUNEL assay and flow cytometry. Control cells were not exposed to UVB. Non-apoptotic cells have low fluorescence while UVB-induced apoptotic cells are shifted into a higher fluorescence window. During incubation in medium with 5 mM Ba2+ cells exposed to UVB remain the non-apoptotic window.
