isozyme

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Related to Allozymes: RFLP, haplotype

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

(ī′sə-zīm′)
n.
An isoenzyme.

i′so·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.

isozyme

see ISOENZYME.
References in periodicals archive ?
Evidence of a biogeographic break between populations of a high dispersal starfish: congruent regions within Indo-west Pacific defined by colormorphs, mtDNA, and allozymes data.
Among genetic markers, there are several suitable for detecting differences among three mussel forms: allozyme loci (MPI*, ONDH*, PGM*, and GPI* are known as the best candidates), fragment length polymorphic DNA [attached protein of the byssus of mussels (GLU-5), the internal transcribed spacer of 18S rRNA (ITS-1,2), etc.], and direct nucleotide sequence differences in DNA fragments or genes, including mtDNA (Skibinski et al.
Allozyme variation in the three extant populations of the narrowly endemic cycad Dioon angustifolium Miq.
Allozymes and microsatellites genetic variability parameters for two Drosophila maculifrons natural populations from Guarapuava/PR (Brazil).
Diversity estimates obtained with allozymes indicate that these populations have lower allelic diversity and low level of observed heterozygosity.
Initially, Kaeriyama (1999) indicated that, on the basis of allozymes, Japanese populations were less variable than Russian wild populations.
By means of cellulose acetate gel electrophoresis, wherein 8 allozyme loci (FUM, G6PDH, GOT, IDH, LDH, MPI, PGI, and PGM) were studied, we investigate whether the genetic variation among species is larger compared to the variation among populations within species and indicative of reproductive isolation among the species.
Evaluation of the performance of animals stocked in natural conditions is possible following allozyme tagging.
Molecular markers: Allozymes.--The following 13 loci were interpreted: Acn, F16dp, G3pdh, Idh, Mdh-1, Mdh-2, Me, Pgi-2, Pgm, Skdh, 6-pgd, Tpi-1 and Tpi-2.