>tr|I7HB73|I7HB73_HUMAN MHC Class II antigen (Fragment) OS=Homo sapiens OX=9606 GN=HLA-DRB1 PE=4 SV=1 RFLEYSTGECYFFNGTERVRFLDRYFHNQEEYVRFDSDVGEYRAVTELGRPSAEYWNSQK DILEDRRALVDTYCRHNYGVGESFTVQRR