isozyme

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isoenzyme

 [i″so-en´zīm]
any of several forms of an enzyme that all catalyze the same reaction but may differ in reaction rate, inhibition by various substances, electrophoretic mobility, or immunologic properties. Several enzymes, particularly alkaline phosphatase, lactate dehydrogenase, and creatine kinase, have clinically important isoenzymes. Isoenzymes are separated by electrophoresis, and the pattern indicates which damaged organ has released the enzymes.

i·so·en·zyme

(ī'sō-en'zīm),
An enzyme (one of a group) that catalyze the same reaction but may be differentiated by variations in physical properties, such as isoelectric point, electrophoretic mobility, kinetic parameters, or modes of regulation, for example, lactate dehydrogenase, a tetramer composed of varying amounts of α and β subunits (that is, 4α, 3α + 1β, 2α + 2β, 1α + 3β, and 4β).
Synonym(s): isozyme

isozyme

/iso·zyme/ (i´so-zīm) one of the multiple forms in which an enzyme may exist in an organism or in different species, the various forms differing chemically, physically, or immunologically, but catalyzing the same reaction.

isozyme

(ī′sə-zīm′)
n.
An isoenzyme.

i′so·zy′mic adj.

isozyme

See isoenzyme.

i·so·en·zyme

(ī'sō-en'zīm)
One of a group of enzymes that catalyze the same reaction but may be differentiated by variations in physical properties, such as isoelectric point, electrophoretic mobility, kinetic parameters, or modes of regulation.

isozyme

see ISOENZYME.

isozyme

isoenzyme.
References in periodicals archive ?
Genetic purity of sunflower hybrids determined on the basis of isozymes and seed storage proteins.
Carbonic Anhydrase Inhibitors: Inhibition of the Transmembrane Isozyme XIV with Sulphonamides.
Activation and deactivation of nitrate reductase isozymes in the leaves of barley plants under light and dark conditions.
Genetic control and linkage relations of additional isozyme markers in chickpea.
In general, acid isozyme activity was higher than neutral isozyme activity; above all, activity was influenced with distinct characteristics for each treatment (Figures 2A, 2B, 2D, and 2E).
Alternatively, the absence or the lower levels of EST isozymes available may be caused by the ability of carboxylesterase and acetylesterase to hydrolyze the fungicide compounds (Cabrio Top[R], Orthocide 500[R], Positron Duo[R] and Folicur PM[R]) as substrates instead of their typical [alpha]- and [beta]-naphthyl substrates.
angustifolia plants from other states of Mexico for three isozymes.
The development and application of isozymes was a breakthrough in estimating plant population outcrossing rates and was mainly explored in perennial trees.