We have the glycolipid, which we spoke about here, and we also have these cholesterol molecules. So notice that the hydroxyl group shown in orange basically interacts with these blue heads of the nearby phospholipids. And these hydroxyl groups basically points toward the aqueous environment either into the cell or out of the cell. In the case of these glycolipids, these sugar molecules also interact with these nearby blue heads of the nearby phospholipid molecules, and they also point toward the extracellular aqueous environment towards the outside of the cell, as shown here. Now, the final note that I'd like to add about cholesterol molecules is the following. Even though even though some bacterial cells, for instance, the mycoplasma, contain cholesterol, cholesterol molecules are actually predominantly eukaryotic membrane lipids.