Enzymes aren't consumed in reactions. Are cofactors consumed
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Enzymes aren't consumed in reactions. Are cofactors consumed

[From: ] [author: ] [Date: 12-07-07] [Hit: ]
So cofactor doesnt imply anything about whether or not it plays a role in the reactivity.-Cofactors, like enzymes, are catalysts and are not generally consumed.......
"Cofactor" really means anything that's not an amino acid which is bound to the enzyme and required for it to function. A cofactor like NAD+/NADH usually participates as an electron acceptor/donor in the reaction, so it's part of the reaction.
On the other hand a metal ion might just sit in the protein and coordinate to a couple of negatively charged ligands and have a purely structural role, with no participation at all. And the cytochrome cofactors in Cytochrome C Oxidase participate in the reaction, but act as catalysts and aren't consumed.

So 'cofactor' doesn't imply anything about whether or not it plays a role in the reactivity.

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Cofactors, like enzymes, are catalysts and are not generally consumed.
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