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| Pronunciation:  |   | kow'enzIm
 
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 WordNet Dictionary |  
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|   | Definition: |   | [n]  a small molecule (not a protein but sometimes a vitamin) essential for the activity of some enzymes   |  
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|   | See Also: |   | cocarboxylase, coenzyme A, coenzyme Q, molecule, NAD, nicotinamide adenine dinucleotide, thiamine pyrophosphate, triphosphopyridine nucleotide, ubiquinone |       |  
 Biology Dictionary |  
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|   | Definition: |   | An organic, nonprotein molecule that binds with an apoenzyme (a protein  molecule) to form an active enzyme. Coenzymes are often derived from  vitamins. |  
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 Glossary |  
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|   | Definition: |   | An organic molecule, such as a vitamin, that binds to an enzyme and is required for its catalytic activity. |  
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