Catalases are antioxidant enzymes that catalyse the conversion of hydrogen peroxide to water and molecular oxygen, serving to protect cells from its toxic effects. Most catalases are monofunctional, haem-containing enzymes, although there are also bifunctional haem-containing peroxidase/catalases that are closely related to plant peroxidases, and non-haem, manganese-containing catalases that are found in bacteria .
Family-defining Pfam domains (at least one of these domains is present in each family member):
|Pfam domain||Pfam clan|
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