Now, what begins to happen is two different processes, two different pathways begin to take place. One of these pathways is a quick process and the other pathway is a bit slower. So we have the extrinsic pathway, that's the quick one, and we have the slightly slower one, that's the intrinsic pathway. So in the extrinsic path and what happens is as a result of that cut in the blood vessel, we have a glycoprotein found in the membrane of that blood vessel that is exposed. And that membrane glycoprotein, the integral glycoprotein, is known as tissue factor or TF. So all the molecules in this diagram that are purple, they're simple proteins, and in this case, this is a glycoprotein.