RASGRP2 and myeloid sarcoma: The cognate peptide from one T cell clone was mapped to a sequence from RAS guanyl-releasing protein 2 (RASGRP2), a previously unidentified MS autoantigen which is expressed in B cells, striatal neurons and cortical grey matter in the brain but is not a constituent of myelin, indicating that autoantigenic targets in MS do not necessarily need to be myelin proteins (72).