1.11.1.6 2 H2O2 = O2 + 2 H2O - - 1.11.1.6 2 H2O2 = O2 + 2 H2O A hemoprotein. This enzyme can also act as a peroxidase, EC 1.11.1.7, for which several organic substances, especially ethanol, can act as a hydrogen donor. A manganese protein containing Mn(III) in the resting state, which also belongs here, is often called pseudocatalase. Enzymes from some microorganisms, such as Penicillium simplicissimum, which exhibit both catalase and peroxidase activity, have sometimes been referred to as catalase-peroxidase - 1.11.1.6 2 H2O2 = O2 + 2 H2O reaction mechanism, overview -, 723832