Immunogen sequence: RIEGIQNMPN VRDHDASVYL RLQGDALSVG GYEANPIFWE EVSDKFAFGL FDLDWEVFTQ HIEGAINRVP VLEKTGIKST VCGPESFTPD HKPLMGEAPE LRGFFLGCGF NSAGMMLGGG CGQELAHWII HGRPEKDMHG YDIRRFHHSL TDHPRWIRER SHESYAKNYS VVFPHDEPLA GRNMRRDPLH EELLGQGCVF QERHGWERPG WFH