Transfer of an acetyl group (CH3CO–) from one compound to another; such reactions, usually involving formation of acetyl-CoA, occur notably in the initiation of the tricarboxylic acid cycle by the transfer of an acetyl group to oxaloacetate to form citrate.

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trans·ac·e·tyl·a·tion (trans″ə-set″ə-laґshən) a chemical reaction involving 2. the transfer of an acetyl group. It occurs in many metabolic reactions.

Medical dictionary. 2011.

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