And these protein complexes are known as major histocompatibility complexes or simply MHC. Now, these protein complexes must be coded by some type of section within our DNA. But what happens if there is a mutation within that section of our genetic code? That means we no longer have the ability, this cell no longer has the ability to produce this MHC complex that is needed to actually display the self antigen. And in this particular case, our white blood cells. When they approach this otherwise healthy cell they will not notice those self antigens because the self antigens will not be able to bind onto the membrane because of the missing major histocompatibility complex.