The Cofactor (biochemistry) reference article from the English Wikipedia on 24-Apr-2004 (provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Cofactor (biochemistry)

A cofactor is any substance that needs to be present in addition to an enzyme for a certain reaction to take place.

When a cofactor is an organic substance that directly participates as a substrate in the reaction, it is called a coenzyme.

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