Immunogen sequence: MVFRRFVEVG RVAYVSFGPH AGKLVAIVDV IDQNRALVDG PCTQVRRQAM PFKCMQLTDF ILKFPHSAHQ KYVRQAWQKA DINTKWAATR WAKKIEARER KAKMTDFDRF KVMKAKKMRN RIIKNEVKKL QKAALLKASP KKAPGTKGTA AAAAAAAAAK VPAKKITAAS KKAPAQKVPA QKATGQKAAP APKAQKGQKA PAQKAPAPKA SGK