Superoxide dismutase
s Superoxide dismutase (SOD, EC 1.15.1.1) is any of a family of enzymes that alternately catalyze the dismutation (or partitioning) of the superoxide (O−2) anion radical into normal molecular oxygen (O2) and hydrogen peroxide (H2O2). Superoxide is produced as a by-product of oxygen metabolism and, if not regulated, causes many types of cell damage.