Immunogen sequence: LNIENLNGKI QENTFKQQEE ISKLEERVYN VSAEIMAMKE EQVHLEQEIK GEVKVLNNIT NDLRLKDWEH SQTLRNITLI QGPPGPPGEK GDRGPTGESG PRGFPGPIGP PGLKGDRGAI GFPGSRGLPG YAGRPGNSGP KGQKGEKGSG NTLTPFTKVR LVGGSGPHEG RVEILHSGQW GTICDDRWEV RVGQVVCRSL GYPGVQAVHK AAH