: MeSH: Substrate Cycling

Chemical Phenomena > Biochemical Phenomena > Substrate Cycling

Metabolism > Energy Metabolism > Substrate Cycling

Substrate Cycling

A set of opposing, nonequilibrium reactions catalyzed by different enzymes which act simultaneously, with at least one of the reactions driven by ATP hydrolysis. The results of the cycle are that ATP energy is depleted, heat is produced and no net substrate-to-product conversion is achieved. Examples of substrate cycling are cycling of gluconeogenesis and glycolysis pathways and cycling of the triglycerides and fatty acid pathways. Rates of substrate cycling may be increased many-fold in association with hypermetabolic states resulting from severe burns, cold exposure, hyperthyroidism, or acute exercise.

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RDF/XML TURTLE JSON-LD Date de création 11/05/1988, dernière modification le 01/07/2016

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