isoenzyme

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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

isoenzyme

(ī′sō-ĕn′zīm′)
n.
An isoform that is an enzyme.

i′so·en·zy′mic adj.

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.

isoenzyme (isozyme)

one of a number of ENZYMES that catalyse the same reaction, but are qualitatively different from each other, for example in PRIMARY STRUCTURE.

Isoenzyme

One of a group of enzymes that catalyze the same reaction but are differentiated by variations in physical properties.
References in periodicals archive ?
(19.) Cristina N, Darde ML, Boudin C, Tavernier G, PestreAlexandre M, AmbroiseThomas P A DNA fingerprinting method for individual characterization of Toxoplasma gondii strains: combination with isoenzymatic characters for determination of linkage groups.
A genetic analysis, using isoenzymatic loci partially diagnostic between the two taxa, has clearly revealed the hybrid status of the mussels that originated from Groix (Coustau et al.
The bees resulting from these processes are known as Africanized honey bees and resemble their African parents more than their European parents in terms of morphology, behavior, population dynamics, hemolymph proteins, biochemistry of cuticular hydrocarbons, allelic frequencies of isoenzymatic systems and DNA RFLPs patterns (Sylvester 1982; Daly 1991; Winston 1992).
Of the many isoenzymatic systems, malate dehydrogenase (MDH), acid phosphatase (ACP), phosphoglucose isomerase (PGI), 6-phosphogluconate dehydrogenase (PGD) and isocitrate dehydrogenase (IDH) were reported to be most informative for characterization of maize inbreds (Mauria et al., 2000).
In Spain, the cultivars 'Carrasquin' and 'Prieto Picudo Tinto' also exhibited identical genotypes, in spite of having significant morphological and isoenzymatic differences (MARTIN et al., 2003) with the authors affirming that a greater number of microsatellite markers must be added to distinguish the genotypes.
Studies of isoenzymatic patterns, antigenicity, and genetics have led the WHO to declare that E.
Isoenzymatic analysis of 712 strains of Leishmania infantum in the south of France and relationship of enzymatic polymorphism to clinical and epidemiological features.
PODs exist in numerous isoenzymatic forms and are separated into anionic (acidic) and cationic (basic) types according to their isoelectric points.
For the isoenzymatic assessment proteins were extracted from leaves and young roots of the seedlings.
Since PODs exist in numerous isoenzymatic forms (Hatzilazarou et al, 2006), further experiments need to clarify the relationship between POD type and root morphological modification due to mycorrhization.