So tissue factor is a glycoprotein that is basically exposed when the blood vessels in our cardiovascular system experience some type of trauma. And these glycoproteins, the tissue factor, is found on the membrane of epithelial cells and once the tissue factor, the glycoprotein, is exposed, it initiates the extrinsic pathway of the blood clotting cascade. It basically initiates the formation of blood clots, the coagulation process. Now, antibodies are also glycoproteins, which basically are found floating within our blood plasma. And we have many different types of antibodies. So what these immunoglobulins do is basically they bind onto pathogenic or infectious antigens and they initiate some type of immune defense or response that ultimately kills off that infecting agent.