In seeking an explanation for this correlation between milk consumption and MS mortality, studies [164,165,166] found the highest levels of sequence homology between the major milk fat protein butyrophilin (BTN) and myelin oligodendrocyte glycoprotein (MOG), a protein important in the myelination or sheathing process of the nerves in the central nervous system. The gene discussed is MOG; the disease is myeloid sarcoma.