Immunogen sequence: MRRKGRCHRG SAARHPSSPC SVKHSPTRET LTYAQAQRMV EIEIEGRLHR ISIFDPLEII LEDDLTAQEM SECNSNKENS ERPPVCLRTK RHKNNRVKKK NEALPSAHGT PASASALPEP KVRIVEYSPP SAPRRPPVYY KFIEKSAEEL DNEVEYDMDE EDYAWLEIVN EKRKGDCVPA VSQSMFEFLM DRFEKESHCE NQKQGEQQSL IDE