cofactor

  1. Noun.  a contributing factor.
  2. Noun.  (biochemistry) a substance, especially a coenzyme or a metal, that must be present for an enzyme to function.
  3. Noun.  (biochemistry) a molecule that binds to and regulates the activity of a protein.
  4. Noun.  (mathematics) the result of a number being divided by one of its factors .

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This entry was last updated on RefTopia from its source on 3/20/2012.