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Conventional phospholipids such as phosphatidyl-ethanolamine contain ester bonds to link R1 and R2 acyl-moieties at the sn-1 and sn-2 positions of glycerol, respectively. Ethanolamine-plasmalogens (also termed plasmenyl-ethanolamine) are characterized by the presence of a vinyl-ether bond at the sn-1 position of the glycerol backbone to link alkenyl-moieties and an ester bond at the sn-2 position to link acyl-residues.
