Now, what exactly is a glycos aminoglycan? Well, a glycosaminoglycan is basically some type of disaccharide repeating unit that contains an aminosugar derivative. And one common example of a glycos aminoglycan in the human body is a molecule known as heparin, which basically looks something like this. So we have a disaccharide component that contains our amino sugar derivative and this is basically repeated many, many times. And then we connect this to our proteoglycan and that is our proteogly glycos aminoglycan molecule. Now, what exactly is the purpose of these proteoglycans attached to our glycos aminoglycan?