Immunogen sequence: LSTCKTIDME LVKRKRIEAI RGQILSKLRL ASPPSQGEVP PGPLPEAVLA LYNSTRDRVA GESADPEPEP EADYYAKEVT RVLMVDRNNA IYEKTKDISH SIYMFFNTSD IREAVPEPPL LSRAELRLQR LKSSVEQHVE LYQKYSNNSW RYLGNRLLTP TDTPEWLSFD VTGVVRQWLN QGDGIQGFRF SAHCSCDSKD NKLHVEINGI SPK