coenzyme

(noun)

An organic molecule that is necessary for an enzyme to function.

Related Terms

  • allosteric site
  • cofactor

Examples of coenzyme in the following topics:

  • Control of Metabolism Through Enzyme Regulation

    • Many enzymes only work if bound to non-protein helper molecules called cofactors and coenzymes.
    • Coenzymes are organic helper molecules with a basic atomic structure made up of carbon and hydrogen.
    • The most common coenzymes are dietary vitamins.
    • The availability of various cofactors and coenzymes regulates enzyme function.
    • Vitamins are important coenzymes or precursors of coenzymes and are required for enzymes to function properly.
  • Breakdown of Pyruvate

    • In order for pyruvate, the product of glycolysis, to enter the next pathway, it must undergo several changes to become acetyl Coenzyme A (acetyl CoA).
  • Essential Nutrients for Plants

    • Sulfur is part of certain amino acids, such as cysteine and methionine, and is present in several coenzymes.
  • Citric Acid Cycle

    • A phosphate group is substituted for coenzyme A, and a high-energy bond is formed.
  • Anaerobic Cellular Respiration

    • The first reaction is catalyzed by pyruvate decarboxylase, a cytoplasmic enzyme, with a coenzyme of thiamine pyrophosphate (TPP, derived from vitamin B1 and also called thiamine).
  • Energy and Nutrient Requirements for Prokaryotes

    • It is also present in several vitamins and coenzymes.
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