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Activated choline --> cytidine diphosphocholine

An intermediate in the formation of phosphatidylcholine (lecithin); formed by the action of cytidine 5'-triphosphate on phosphocholine, linking the choline phosphate group to the alpha-phosphate of the cytidine 5'-triphosphate to give a pyrophosphate.

Synonym: activated choline, cytidine diphosphate choline.