Immunogen sequence: MAAQKINEGL EHLAKAEKYL KTGFLKWKPD YDSAASEYGK AAVAFKNAKQ FEQAKDACLR EAVAHENNRA LFHAAKAYEQ AGMMLKEMQK LPEAVQLIEK ASMMYLENGT PDTAAMALER AGKLIENVDP EKAVQLYQQT ANVFENEERL RQAVELLGKA SRLLVRGRRF DEAALSIQKE KNIYKEIENY PTCYKKTIAQ VLVHLHRNDY VAA