Canadian Medical Guide > Chemicals and Drugs > Enzymes and Coenzymes > Enzymes > Oxidoreductases > Peroxidases Terms and Definitions

Peroxidases

Medical Definition:
Guide Notes:	a subclass of oxidoreductases: do not confuse with PEROXIDASE, a peroxiductase synthesized by leukocytes
Also Called:	Ovoperoxidase
CAS Number:	EC 1.11.1.

Peroxidases Categories.

	Catalase - An oxidoreductase that catalyzes the conversion of hydrogen peroxide to water and oxygen. It is present in many animal cells. A deficiency of this enzyme results in ACATALASIA. EC 1.11.1.6.
	Chloride Peroxidase - An enzyme that catalyzes the chlorination of a range of organic molecules, forming stable carbon-chloride bonds. EC 1.11.1.10.
	Cytochrome-c Peroxidase - A hemeprotein which catalyzes the oxidation of ferrocytochrome c to ferricytochrome c in the presence of hydrogen peroxide. EC 1.11.1.5.
	Glutathione Peroxidase - An enzyme catalyzing the oxidation of 2 moles of glutathione in the presence of hydrogen peroxide to yield oxidized glutathione and water. EC 1.11.1.9.
	Horseradish Peroxidase - An enzyme isolated from horseradish which is able to act as an antigen. It is frequently used as a histochemical tracer for light and electron microscopy. Its antigenicity has permitted its use as a combined antigen and marker in experimental immunology.
	Iodide Peroxidase - A hemeprotein that catalyzes the oxidation of the iodide radical to iodine with the subsequent iodination of many organic compounds, particularly proteins. EC 1.11.1.8.
	Lactoperoxidase - An enzyme derived from cow's milk. It catalyzes the radioiodination of tyrosine and its derivatives and of peptides containing tyrosine.
	Peroxidase - A hemeprotein from leukocytes. Deficiency of this enzyme leads to a hereditary disorder coupled with disseminated moniliasis. It catalyzes the conversion of a donor and peroxide to an oxidized donor and water. EC 1.11.1.7.

Peroxidases Medical Definitions and Terms

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