Superoxide dismutase(SOD) in eggs can inhibit the photoreduction of nitro-blue tetrazolium (NBT).Thisreaction can be used to quantitatively determine the enzyme activities of SOD.

鸡蛋中超氧物歧（SOD）以抑制蓝四唑（NBT）还原，以根据SOD对NBT还原抑制作为活性定量测定。