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choline acetyltransferase

n.
  1. An enzyme, present at the presynaptic ends of axons, that catalyzes the transfer of the acetyl group of acetyl CoA to choline, forming acetylcholine.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.