Immunogen sequence: MRPEGSLTYR VPERLRQGFC GVGRAAQALV CASAKEGTAF RMEAVQEGAA GVESEQAALG EEAVLLLDDI MAEVEVVAEE EGLVERREEA QRAQQAVPGP GPMTPESALE ELLAVQVELE PVNAQARKAF SRQREKMERR RKPHLDRRGA VIQSVPGFWA NVIANHPQMS ALITDEDEDM LSYMVSLEVE EEKHPVHLCK IMLFFRSNPY FQN