Now, the final thing I'd like to discuss in this lecture is this disease we call the eye cell disease, also known as Mucolipidosis II, which is basically a liposomal storage disease. So what exactly does that mean? Well, inside our normal cells we basically have an organelle known as a lysosome. And inside the lysosome we have these digestive enzymes, these hydrolytic enzymes. And what they do is they basically recycle and break down the different types of byproducts which are produced inside the cells. So they break down things like large carbohydrates and glycosaminoglycans and glycolipids.