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Isozyme


Isozymes (also known as isoenzymes) are enzymes that differ in amino acid sequence but catalyze the same chemical reaction. These enzymes usually display different kinetic parameters (i.e. different KM values), or different regulatory properties.
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A different electrophoretic form of the same multi-subunit enzyme. Unlike allozymes isozymes are due to differing subunit configurations rather than allelic differences.
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Isozyme
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Isozymes, (or isoenzymes) are isoforms (closely related variants) of enzymes. In many cases, they are coded for by homologous genes that have diverged over time.
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Isozyme refers to polymorphic enzymes that result from different loci, while the term allozyme is reserved for allelic enzymes.
Allozyme polymorphisms are also used in phylogenetic and population analysis.
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isozyme Different chemical forms of the same enzyme; thought to be important in adaptation to environmental extremes.
iteroparity The production of offspring by an organism in successive bouts. Contrast with semelparity.
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isoenzymes isozymes. isomerases Enzymes that catalyze the transformation of compounds into their positional isomers.
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Related Terms: Isoenzyme (isozyme)
Multiple forms of an enzyme whose synthesis is controlled by more than one gene. See also alloenzyme.
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Kurata reported construction of a rice cDNA expression map that includes information on tissue specificity, distribution of isozyme genes, gene families, and such functionally related genes as ribosomal protein genes and the histone gene family.
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