| 1. | The enzyme can be obtained in both apoenzyme and holoenzyme forms.
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| 2. | Crystallographic studies have helped elucidate the apoenzyme structure of phosphopentose epimerase.
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| 3. | Cytochrome c oxidase ( COX ), the terminal component of the apoenzyme.
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| 4. | However, the apoenzyme without copper is unstable.
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| 5. | The apoenzyme form, lacking the zinc cofactor, has a molecular weight of 382815.4 g / mol.
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| 6. | This protein has also been used in fluorescent sensing either simply as an apoenzyme or as an as a holoenzyme.
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| 7. | An inactive enzyme without the cofactor is called an apoenzyme, while the complete enzyme with cofactor is called a holoenzyme.
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| 8. | A mutant ( D58A, in one of the active-site loops ) was crystallized as an apoenzyme also ( ).
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| 9. | In this system, the inactive form ( the apoenzyme ) becomes the active form ( the holoenzyme ) when the coenzyme binds.
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| 10. | Enzymes that require a cofactor but do not have one bound are called " apoenzymes " or " apoproteins ".
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