Immunogen sequence: MEFLGTTQTA SYCGPKKCCG LTSLPAVQAP VIQECYQPYY LPGYRYLNSW RPSLFYKIAN VQTCPDESTS TLRPPTILPT LRSALFSRYS PHDWDQSNQL QVRGAEASRL WASRLTDDSM RLLQDKDQLT HQMQEGTCRN LGQRLSDIGF WKSELSYELD RLLTENQNLE TVKRRLECAA NEVNCPLQVA LECLYHREKR IGIDLVHDNV EKN