coenzyme

[ koh-en-zahym ]

noun

, Biochemistry.

1. a molecule that provides the transfer site for biochemical reactions catalyzed by an enzyme.

coenzyme

/ kəʊˈɛnzaɪm /

noun

1. biochem a nonprotein organic molecule that forms a complex with certain enzymes and is essential for their activity See also apoenzyme

coenzyme

/ kō-ĕn′zīm′ /

1. A nonprotein organic substance that usually contains a vitamin or mineral and combines with a specific protein, called an apoenzyme , to form an active enzyme system.

Other Words From

• co·en·zy·mat·ic [koh-en-zahy-, mat, -ik, -zi-], adjective
• co·enzy·mati·cal·ly adverb

Word History and Origins

Origin of coenzyme¹

1905–10; < German Ko-enzym; co-, enzyme

Example Sentences

Antioxidants like vitamins C and E, alpha-lipoic acid, and coenzyme Q10 offer skin cells extra protection from sun damage.

From Outside Online

They can usually be separated from their corresponding enzymes by dialysis, the coenzyme passing through the parchment membrane.

From Project Gutenberg

The best known example of a coenzyme in plant tissues is in connection with the activity of the zymase of yeast cells.

From Project Gutenberg