Sphingolipids, also found in membranes, contain sphingosine instead of glycerol. One class...

Sphingolipids, also found in membranes, contain sphingosine instead of glycerol. One class of sphingolipids, sphingomyelins, are a major constituent of the coating around nerve fibers. In a sphingomyelin, the amino group of sphingosine is bonded to the acyl group of a fatty acid and the primary alcohol group forms an ester with phosphoric acid, which also forms an ester with choline. Draw the structure of a sphingomyelin.