Membrane lipid microdomain is a newly discovered membrane confined domain which consists of sphingomyelin, choles terol , glycosphingolipid and many GPI anchored proteins.

脂区为近年发现的广泛存在于质膜,主要由鞘脂、鞘磷脂、胆固醇及多GPI锚联蛋白组成的结构域。