And then these cytokines induce these B Lymphocytes and T Lymphocyte cells to basically mature and differentiate into even more specialized cells. So these B Lymphocytes basically produce plasma cells as well as memory cells. While the T cell, when it reacts with the cytokines, it produces cytotoxic T cells, also known as killer T cells. And these cytotoxic T cells contain the glycoprotein CD eight, CD eight. And we'll see exactly what that means in just a moment. So let's take a look at these plasma cells.