Immunogen sequence: KNREPLMPSP QFIKSYFSSF TDDIISQPML KGEKSDEDKD KEGEALEVKE NSGYLKAKQY MEEENYDKII SECSKEIDAE GKYMAEALLL RATFYLLIGN ANAAKPDLDK VISLKEANVK LRANALIKRG SMYMQQQQPL LSTQDFNMAA DIDPQNADVY HHRGQLKILL DQVEEAVADF DECIRLRPES ALAQAQKCFA LYRQAYTGNN SSQ