Immunogen sequence: MEPSSLELPA DTVQRIAAEL KCHPTDERVA LHLDEEDKLR HFRECFYIPK IQDLPPVDLS LVNKDENAIY FLGNSLGLQP KMVKTYLEEE LDKWAKIAAY GHEVGKRPWI TGDESIVGLM KDIVGANEKE IALMNALTVN LHLLMLSFFK PTPKRYKILL EAKAFPSDHY AIESQLQLHG LNIEESMRMI KPREGEETLR IEDILEVIEK EGD