سرامید

Also known as ceramide

thumb|Ceramide. R represents the alkyl portion of a fatty acid. thumb|class=skin-invert|upright=2|General structures of sphingolipids Ceramides are a family of waxy lipid molecules. A ceramide is composed of sphingosine and a fatty acid joined by an amide bond. Ceramides are found in high concentrations within the cell membrane of eukaryotic cells, since they are component lipids that make up sphingomyelin, one of the major lipids in the lipid bilayer. Contrary to previous assumptions that ceramides and other sphingolipids found in cell membrane were purely supporting structural elements, cera