Immunogen sequence: NLAEFERRAE KNLLIMCKEK EKLQKKAHEL KRRLLLSQRK RELADVLDAQ IEMLSPFEAV ATRFKEQYRT FATALDTTRH ELPVRSIHLE GDGQQLLDAL QHELVTTQRL LGELDVGDSE ENVQVLDLLS ELKDVTAKKD LELRRSFAQV LELSAEASKE AALANQEVWE ETQGMAPPSR WYFNQDSACR ESGGAPKNTP LSEDDNPGAS SAP