Cytotoxic T cells are specific and what that means is they will only bind to a specific antigen while natural killer cells are nonspecific. It doesn't matter what type of antigen is found on the, on that pathogenic cell, this will bind to it. But this only binds to a specific cell. And that's because this dendritic cell brought a specific type of antigen to this cytotoxic T cell. So it will only react to this specific antigen that was brought to it. Now, finally, we also have suppressor T cells and memory T cells.