catalase activity https://github.com/geneontology/go-ontology/issues/30193 hydrogen-peroxide:hydrogen-peroxide oxidoreductase activity haem catalase activity catalase reaction GO:0016952 GO:0016953 caperase activity molecular_function manganese catalase activity Reactome:R-HSA-1222704 optidase activity catalase-peroxidase activity equilase activity UM-BBD_enzymeID:r1335 Reactome:R-HSA-76031 RHEA:20309 CAT Catalysis of the reaction: 2 H2O2 = O2 + 2 H2O. bacterial catalase-peroxidase activity heme catalase activity GO:0004096 EC:1.11.1.6 MetaCyc:CATAL-RXN peroxidase activity