Immunogen sequence: ASSRVIVHVD LDCFYAQVEM ISNPELKDKP LGVQQKYLVV TCNYEARKLG VKKLMNVRDA KEKCPQLVLV NGEDLTRYRE MSYKVTELLE EFSPVVERLG FDENFVDLTE MVEKRLQQLQ SDELSAVTVS GHVYNNQSIN LLDVLHIRLL VGSQIAAEMR EAMYNQLGLT GCAGVASNKL LAKLVSGVFK PNQQTVLLPE SCQHLIHSLN HIK