Immunogen sequence: MAAAALGSSS GSASPAVAEL CQNTPETFLE ASKLLLTYAD NILRNPNDEK YRSIRIGNTA FSTRLLPVRG AVECLFEMGF EEGETHLIFP KKASVEQLQK IRDLIAIERS SRLDGSNKSH KVKSSQQPAA STQLPTTPSS NPSGLNQHTR NRQGQSSDPP SASTVAADSA ILEVLQSNIQ HVLVYENPAL QEKALACIPV QELKRKSQEK LSR