Now, to see exactly what we mean, let's take a look at the following four examples of glycosaminoglycans that we'll find inside our body. So one of these glycosaminoglycans we actually discussed previously, so that is Heparin. We said heparin is this glycosaminoglycan that is produced and released by immune cells we call mast cells. And we believe that heparin plays a role in immune lead, plays a role in actually helping our body fight off infectious agents. On top of that, heparin also acts as an anticoagulant. So this is what the structure of that repeating disaccharide unit in Heparin actually looks like.