Choline acetyltransferase (abbreviated "ChAT") is an enzyme that is synthesized within the body of a neuron. It is then transferred to the nerve terminal via axoplasmic flow. The role of choline acetyltransferase is to join Acetyl-CoA to choline, resulting in the formation of the neurotransmitter acetylcholine. In humans, the choline acetyltransferase enyzme is encoded by the CHAT gene.
Read more about Choline Acetyltransferase: Function