Fig. 2. The pathway for the biosynthesis of phosphatidylcholine (PC) from phosphatidylethanolamine(PE) via the intermediates phosphatidylmonomethylethanolamine
(PMME) and phosphatidyldimethylethanolamine (PDME) discovered by Jon Bremer
(photographed in 1998) and David Greenberg [13]. AdoMet, S-adenosylmethionine;
AdoHcy, S-adenosylhomocysteine; Hcy, homocysteine.