pseudoperoxidase

Referring to the nonenzymatic, heat-stable peroxidase activity associated with hemeproteins.

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pseu·do·per·ox·i·dase (soo-do-pər-okґsĭ-dās) any of a class of substances, including hemoglobin, that act like peroxidase, catalyzing a reduction-oxidation reaction between hydrogen peroxide and a variety of organic compounds.