preparations were incubated with tracer concentrations of l- [ ( 3 ) h ( 3 ) c ] methionine and the kinetics of appearance of radioactivity in phosphomethylethanolamine , phosphodimethylethanolamine , phosphocholine , phosphatidylmethylethanolamine , phosphatidyldimethylethanolamine , phosphatidylcholine , methylethanolamine , dimethylethanolamine , and choline followed at short incubation times .
C0031716
phosphocholine
C0008405
choline