So, basically, we can modify proteins in the Golgi apparatus either by adding carbohydrates on it or modifying in some other type of way. For example, we phosphorylate our proteins. Now, inside the Golgi apparatus, we also form several types of polysaccharides. So our Golgi apparatus contains many important enzymes that are involved in forming different types of polysaccharides of sugars. And one other important function of the Golgi apparatus is to basically create lysosomes. So what happens is certain proteins that end up staying in our cytosol will basically leave the Golgi apparatus in a vesicle, in a secretory vesicle, and that secretary vesicle becomes a lysosome.