methyltransferase i , which catalyzes methylation of phosphatidylethanolamine to phosphatidyl-n-mono-methylethanolamine was inhibited by gtp , whereas methyltransferase ii , which transfers methyl groups from s-adenosyl-l-methionine to produce phosphatidyl-n , n-dimethylethanolamine or phosphatidyl-choline was stimulated by gtp .
C0025831
methyltransferase
C0025723
methylation