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.

鸡蛋中超氧化物歧化酶（SOD）制蓝（NBT）光化还原，根据SOD对NBT光化还原制作为酶活性定量测定。