Immunogen sequence: MALDVKSRAK RYEKLDFLGE GQFATVYKAR DKNTNQIVAI KKIKLGHRSE AKDGINRTAL REIKLLQELS HPNIIGLLDA FGHKSNISLV FDFMETDLEV IIKDNSLVLT PSHIKAYMLM TLQGLEYLHQ HWILHRDLKP NNLLLDENGV LKLADFGLAK SFGSPNRAYT HQVVTRWYRA PELLFGARMY GVGVDMWAVG CILAELLLRV PFL