1*Cytosol**Synaptic Cleft*ChatCholinePdha1Pdha2CholinePemtPcyt1aPhosphatidylethanolamineAchePhosphorylcholineAcetylcholineAcetateChkaPhosphatidylcholineAcetyl-CoAPyruvate from GlycolysisGlycerophosphocholineCytidine diphosphate choline