The fundamental structure of a cerebroside is ceramide. This reaction is catalyzed by cerebroside sulfotransferase (CST). Thudichum discovered in human brain some phospholipids (cephalin), glycolipids (cerebroside) and sphingolipids (sphingomyelin). A glycosphingolipid that has only one sugar as the side chain is called a cerebroside. Cerebroside synthesis can therefore give a measurement of myelin formation or remyelination.