rat brain synaptosomes contain an enzyme , phosphatidylethanolamine n-methyltransferase ( ec 2.1.1.17 ) , that catalyzes the methylation of phosphatidylethanolamine to form its mono- , di- , and trimethyl ( phosphatidylcholine ) derivatives .
C0070788
phosphatidylethanolamine
C0025723
methylation