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Any of several forms of an enzyme that catalyze the same reaction but differ in chemical structure. Also called isozyme.

i′so·en·zy′mic adj.


(Biochemistry) another name for isozyme
isoenzymic, isoenzymatic adj


(ˈaɪ səˌzaɪm)

a variant form of certain enzymes that catalyzes the same reaction as other forms. Also called isoenzyme.
[1959; iso- + (en) zyme]
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References in periodicals archive ?
Four maize hybrids and their parental lines were used to find genetic purity through testing with four isoenzymes such as alcohol dehydrogenase (ADH), esterase (EST), acid phosphatase (ACP) and malate dehydrogenase (MDH) and evaluated with thirty pairs of simple sequence repeat (SSR) markers.
Clinical studies with different garlic preparations--dried powder, aqueous extracts, deodorized preparations, oils--have demonstrated diverse and highly variable results in tests of effects on CYP isoenzymes and other metabolism activities.
Esterase isoenzymes were analyzed using vertical thin-layer native polyacrylamide gel electrophoresis (PAGE) equipment (DYG-28A electrophoresis cell, DYY-10C electrophoresis power supply; Beijing Liuyi Instrument Factory, Beijing, China), with a 7.
To date, about 16 CA isoenzymes responsible for various functions have been identified.
On the other hand it has been shown that using the various ADA isoenzymes and the isoenzyme ratio can be effective in the segregation of different reasons of increasing ADA in body fluids.
4 U/L); creatine kinase (CK) 615 U/L (reference interval, <190 U/L); CK-MB activity by immunoinhibition technique 760 U/L (reference interval, <10 U/L); CK isoenzymes by electrophoresis, CK-MB <3% (reference interval, <6%) and CK-BB 87% (reference interval, < 1%).
Clopidogrel is a prodrug that requires biotransformation by several hepatic cytochrome P-450 (CYP) isoenzymes including CYP2C19 to become an active metabolite [3].
These results are comparable to isoenzymes AcP1 and AcP2 isolated from rat liver [12] and isoenzymes from other sources [23-24].
Cytochrome P-450 (CYP) is the family of isoenzymes that carry out metabolism of drugs and other substances in the body.
The enzyme 17-[beta]-HSD is part of a group of isoenzymes that are involved in both the synthesis and metabolism of the sex hormones, androgens, and estrogens.