Now, we develop a cancer cell when our abnormal cell essentially loses its ability to control the way that it divides. And that's exactly why cancer cells divide rapidly and uncontrollably and eventually form large, visible NASA we call tumors. And because these tumors are so large they can affect the way that our body functions and they can ultimately kill that organism, kill that individual. The question is not everybody actually develops cancer in their lifetime. And because on a daily basis we produce anywhere from several to 1000 of these different cancer cells how exactly does our immune surveillance system, our immune system in general actually detect these cancer cells and destroy these cancer cells? Well, since these cancer cells have a slightly different sequence of nucleotides on their DNA they will produce slightly different proteins.