2.4.1.47 N-acylsphingosine galactosyltransferase gala-series glycosphingolipids biosynthesis - 2.4.1.241 digalactosyldiacylglycerol synthase gala-series glycosphingolipids biosynthesis - 2.4.3.9 lactosylceramide alpha-2,3-sialyltransferase gala-series glycosphingolipids biosynthesis - 2.8.2.11 galactosylceramide sulfotransferase gala-series glycosphingolipids biosynthesis -