And this is known as TF, which stands for tissue factor. Now, everything shown in this diagram that is purple, that basically describes a protein that is not an enzyme. And so the tissue factor is not an actual enzyme. It's simply a glycoprotein that exists on the membrane of the of the endothelium. Now, once this is exposed inside the blood plasma, we have this Zionogen we call factor seven. And once this is exposed, factor seven is basically activated via proteolytic cleavage.