And every single RNA molecule basically contains this group here, this unit. Now, the next function of sugars, the next role that sugar is actually playing organisms and this includes inside our own bodies is using sugars to basically modify lipids and proteins. And we'll discuss this in much more detail in the next several lectures. So basically we can diversify the capabilities and the functionality of proteins and lipids by basically attaching sugar components onto these macromolecules. So by combining sugars and proteins and sugars and lipids and so forth, we can basically increase the capabilities of these molecules. For instance, we already spoke about an important glycoprotein when we discussed the coagulation cascade.