It allows the adaptive immune system to actually learn from these pathogens that infect our cells of the body. And finally, our T cell differentiates into the cytotoxic T cell and this contains the CD eight glycoprotein on the membrane. Now, the CD eight glycoprotein basically is responsible for binding to the MHC class one, the major histocompatibility complex class one. And this is found on our infected cells of the body. And that's exactly why the cytotoxic T cells are those immune T cell immune cells of our body that are responsible for seeking out and locating the infected cells of our body. And once they bind to those infected cells they basically release special powerful proteins that are capable of digesting and breaking down the membrane of those cells lysing those cells and killing those cells.