Isozymes
Isozymes
Isozymes (pronounced: /ˈaɪsəʊˌzaɪmz/), 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, or different regulatory properties.
Etymology
The term "isozyme" is derived from the prefix "iso-" meaning "equal" and the suffix "-zyme" meaning "enzyme". It was first used in the 1960s to describe enzymes that were functionally identical but structurally different.
Related Terms
- Enzymes: Proteins that act as biological catalysts, speeding up reactions that take place in cells.
- Amino Acids: Organic compounds that combine to form proteins.
- Kinetic Parameters: The various characteristics that define the kinetics of enzyme catalyzed reactions.
- Regulatory Properties: The characteristics of enzymes that allow them to control biological reactions.
Isozymes in Medicine
In medicine, isozymes are of clinical importance because they can be used as biomarkers to diagnose or monitor disease. For example, the isozymes of lactate dehydrogenase (LDH) can be used to diagnose and monitor the progress of myocardial infarction.
See Also
External links
- Medical encyclopedia article on Isozymes
- Wikipedia's article - Isozymes
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