. "This enzyme can also act as an EC 1.11.1.7 for which several organic substances, especially ethanol, can act as a hydrogen donor." . "A manganese protein containing Mn(3+) 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." . . . "Catalase" . "2 H(2)O(2) = O(2) + 2 H(2)O." . "Heme" . "Manganese" .