So we see that gamma delta T cells bind to antigens that alphabeted T cells cannot actually bind to. And what that means is our gamma delta T cells do not contain the CD four and CD eight glycoproteins that are needed to actually bind onto the major histocompatibility complex, class one or class two. Now, let's move on to the location where we normally find our gamma delta T cells. And then let's briefly discuss what the function of these gamma delta T cells is. So, in the same way that our AlphaBeta T cells are produced in the bone marrow and mature in the thymus, the gamma delta T cells are also produced in our bone marrow and differentiate in our thymus. But these gamma delta T cells actually end up in the tissue of our body that interfaces with the outside environment.