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OxidoreductaseIn biochemistry, an oxidoreductase is an enzyme that catalyzes the transfer of electrons from one molecule (the reductant, also called the hydrogen acceptor or electron donor) to another (the oxidant, also called the hydrogen donor or electron acceptor). For example, an enzyme that catalyzed this reaction would be an oxidoreductase:
Additional recommended knowledgeIn this example, A is the reductant (electron donor) and B is the oxidant (electron acceptor). In biochemical reactions, the redox reactions are sometimes more difficult to see, such as this reaction from glycolysis:
In this reaction, NAD+ is the oxidant (electron acceptor), and glyceraldehyde-3-phosphate is the reductant (electron donor). NomenclatureProper names of oxidoreductases are formed as "donor:acceptor oxidoreductase." However, other names are much more common. The common name is "donor dehydrogenase" when possible, such as glyceraldehyde-3-phosphate dehydrogenase for the second reaction above. Common names are also sometimes formed as "acceptor reductase", such as NAD+ reductase. "Donor oxidase" is a special case where O2 is the acceptor. ClassificationOxidoreductases are classified as EC 1 in the EC number classification of enzymes. Oxidoreductases can be further classified into 22 subclasses:
See also
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This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Oxidoreductase". A list of authors is available in Wikipedia. |