PHOSPHATIDYL-O-[N-(2-HYDROXYETHYL)GLYCINE] (PHEG), A NEW GLYCEROPHOSPHOLIPID FROM BROWN-ALGAE (PHAEOPHYCEAE)

The phosphoglyceride phosphatidyl-O-[N-(2-hydroxyethyl) glycine] (PHEG ) has been isolated from Fucus serratus L. (Fucales, Phaeophyceae) and its structure determined by IR, NMR, MS and chemical data of the inta ct lipid (formerly called PX), its lyso compound and the deacylated li pid. The fatty acid composition was about 82 mol% 20:4, 9% 20:5 and 6% 20:0 acids in both the sn-1 and the sn-2 positions of the glycerol pa rt. PHEG was present in 30 different species representing the 16 order s of brown algae in amounts of 8-25 mol% of total phospholipids, and i s suggested to be a compulsory lipid constituent of brown algae.