Wikipedia
Catalase-peroxidase
Catalase-peroxidase (, katG (gene)) is an enzyme with systematic name donor:hydrogen-peroxide oxidoreductase. This enzyme catalyses the following chemical reaction
(1) donor + HO$\rightleftharpoons$ oxidized donor + 2 HO (2) 2 HO$\rightleftharpoons$ O + 2 HOThis enzyme is a strong catalase with HO as donor which releases O.