So let's take a look at the following diagram and examine exactly what the mechanism is by which the natural killer cell detects as well as destroys our cancer cells. So when cells display little or no MHC proteins on their membrane, then that triggers the natural killer cell to basically approach and bind onto that cancer cell. So in this particular case, we have a normal cell, a normal cell and a normal cell that contains a normal antigen, a normal cell antigen shown in green, as well as the MHC class one complex shown in brown. But this cancer cell loses the proper sequence of nucleotides to create the proper protein known as the MHC class One. And so we have none of these MHC class One proteins found on the membrane. And that is what triggers the natural killer cell to approach this cancer cell, bind to it, and begin releasing these granules that contain digestive enzymes.