Immunogen sequence: NTEALQSKFF SPLQKAMLPP NSFQGKVAFI TGGGTGLGKG MTTLLSSLGA QCVIASRKMD VLKATAEQIS SQTGNKVHAI QCDVRDPDMV QNTVSELIKV AGHPNIVINN AAGNFISPTE RLSPNAWKTI TDIVLNGTAF VTLEIGKQLI KAQKGAAFLS ITTIYAETGS GFVVPSASAK AGVEAMSKSL AAEWGKYGMR FNVIQPGPIK TKG