And that basically means it stimulates phagocytic cells of our immune system. It calls upon these phagocytic cells. So C three B goes on and binds onto a special glycoprotein found on the membrane of that particular pathogenic cell. And once bound, it acts in a process known as oxygenization, meaning it calls upon these phagocytic cells, for example, macrophages or neutrophils. And then these phagocytic cells come nearby and basically phagocytes, they engulfed these pathogenic agents. Now, the other function of C three B is to basically go on and bind onto an allosteric site found on a C Five protein.