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Time course of O2•− formation sensed by the NBT approach following the increase in the absorption at 560 nm for NBT + NADH + ZnTEP (●), NBT + NADH + PZnTEP (▲) and NBT + NADH (⯀) in DMF/water (5%), [NBT] = 0.2 mM and [NADH] = 0.5 mM, λirr = 455–800 nm.
