Immunogen sequence: MERPEEGKQS PPPQPWGRLL RLGAEEGEPH VLLRKREWTI GRRRGCDLSF PSNKLVSGDH CRIVVDEKSG QVTLEDTSTS GTVINKLKVV KKQTCPLQTG DVIYLVYRKN EPEHNVAYLY ESLSEKQGMT QESFDTSGAG AGRGADPRVP PSSPATQVCF EEPQPSTSTS DLFPTASASS TEPSPAGRER SSSCGSGGGG ISPKGSGPSV ASD