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Fig. 2. CL changes distribution in apoptosis-sensitive but not in apoptosis-resistant cells or in cells protected with an antioxidant. HL-60 and HCW-2 cells were treated with 5 µM STS; U937 cells and BHT-pretreated U937 cells were treated with TNF-{alpha} + CHX; data represent four independent experiments. *, P < 0.05; **, P < 0.01.