LASS2 (LAG1 homolog, ceramide synthase 2) has sequence similarity to yeast longevity assurance gene 1. It is thought to be involved in sphingolipid synthesis. Expression of LASS2 is transiently increased during the period of active myelination and is specifically localized to white matter tracts of the brain, including the Schwann cells of sciatic nerves suggesting that LASS2 is important for the synthesis of dihydroceramide used for synthesis of myelin sphingolipids. Expression of LASS2 in hepatocellular carcinoma cell lines suppresses the growth of cancer cells.