Figure 1

DAGE and polar lipid molecular species. Content of molecular species of (A) diacylglycerol ethers (% of total DAGE, mean ± SD, n = 6) and (B) polar lipid classes (% of total polar lipids, mean ± SD, n = 3) in the soft coral Paragorgia arborea. The polar lipids are comprised of ceramide aminoethylphosphonate (CAEP), ethanolamine, choline, inositol, and serine glycerophospholipids (PE, PC, PI, and PS, respectively). DAGE molecules are abbreviated as Xe/Y/Z, where Xe is alkyl group, Y and Z are acyl groups (number of carbon atoms : number of double bonds) at sn-1/sn-2/sn-3 positions of the glycerol ether backbone. CAEP molecules are abbreviated as Xd/Y; alkyl/acyl, alkenyl/acyl, and diacyl molecules of glycerophospholipids, as Xa/Y, Xp/Y, and X/Y, respectively. Xd, sphingoid base; Xa, alkyl group; Xp, alk-1-enyl group; X and Y, acyl groups.