Apoenzyme | definition of apoenzyme by Medical dictionary
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the protein component of an enzyme that requires the presence of the prosthetic group (coenzyme) to form the functioning enzyme.
ap·o·en·zyme (apo), (ap'ō-en'zīm),
The protein portion of an enzyme as contrasted with the nonprotein portion, coenzyme, or prosthetic portion (if present in the intact protein).
The protein component of an enzyme, excluding additional components such as cofactors or inhibitors.
apoenzyme The protein part of an enzyme that requires a cofactor/coenzyme. See Apoprotein.
The protein portion of an enzyme as contrasted with the nonprotein portion, or coenzyme, or prosthetic portion (if present).
apoenzyme A protein substance which can act as an ENZYME in the presence of a coenzyme.
References in periodicals archive
An apoenzyme blank was also included in each assay to correct for endogenous PLP that might be present in the apoenzyme extract.
The apoenzyme was stable at -80 [degrees]C for 1 year.
(15) and Baines and Davies (16) have suggested that erythrocyte TDP concentrations determined by the apoenzyme
recombination technique or by HPLC are a more sensitive index of thiamin status than the measurement of erythrocyte transketolase activity.
They are known to sequester metals in the cell and pass metal ions to the apoenzymes
that require them.
Most of the reactions in the canonical anabolic chart require enzymes that may be isolated apoenzymes
or holoenzymes (a combination of apoenzymes
and coenzymes and/or metal ions).
Alternatively, MT can donate Zn to apoenzymes
and transcription factors  and may thus serve as a labile source of Zn that can be utilized in many different organs to activate as-yet-unidentified metalloenzymes that are essential during the stress condition.