Immunogen sequence: MMVLQVSAAP RTVALTALLM VLLTSVVQGR ATPENYLFQG RQECYAFNGT QRFLERYIYN REEFARFDSD VGEFRAVTEL GRPAAEYWNS QKDILEEKRA. HLA-DPB belongs to the HLA class II beta chain paralogues. This class II molecule is a heterodimer consisting of an alpha (