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Experimental procedures for the MTT assay. Each test was repeated in five independent wells. Fenton reagent: FeCl2 (100 μM) followed by H2O2 (50 μM); MTT: 5 mg/mL in PBS, 20 μL; PE-1420 Bio-Kinetics reader: Bio-Kinetics Corporation, Sioux Center, IA, USA.
