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Apoenzyme
The protein portion of a holoenzyme. Many (but not all) enzymes are composed of functional "pieces." For example, a protein piece (chain) and another piece that is an organic and/or inorganic molecule. This other piece is known as a cofactor and it may be removed from the enzyme under certain conditions. When this is done, the resulting inactive enzyme is known as an apoenzyme. The inactive apoenzyme becomes functionally active again if it is allowed to recombine with its cofactor. COFACTOR, ENZYME, HOLOENZYME |
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The term "Apoenzyme" also appears in the definition(s) of the following term(s): Holoenzyme |
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