however , since pmnls could not be labelled sufficiently with [ 3h ] choline , we developed an h.p.l.c . assay to quantify mass levels of phosphorylcholine after enzymic conversion to [ 32p ] cdp-choline with ctp-phosphorylcholine ( choline phosphate ) cytidylyltransferase ( ec 2.7.7.15 ) .
C0008405
choline
C0010725
cdp-choline