Choline/ethanolaminephosphotransferase 1
Cytidine triphosphate + O-Phosphoethanolamine → CDP-ethanolamine + Pyrophosphate
CDP-ethanolamine + DG(18:3(9Z,12Z,15Z)/22:0/0:0) → Cytidine monophosphate + PE(18:3(9Z,12Z,15Z)/22:0)
Phosphatidylserine decarboxylase proenzyme
Ethanolamine-phosphate cytidylyltransferase
Phosphatidylethanolamine Biosynthesis PE(18:3(9Z,12Z,15Z)/22:0)
Adenosine triphosphate + Ethanolamine → Adenosine diphosphate + Hydrogen Ion + O-Phosphoethanolamine