Immunogen sequence: PLKSPGVRPS NPRPGTMRHP TPLQQEPRKI SYSRIPESET ESTASAPNSP RTPLTPPPAS GASSTTDVCS VFDSDHSSPF HSSNDTVFIQ VTLPHGPRSA SVSSISLTKG TDEVPVPPPV PPRRRPESAP AESSPSKIMS KHLDSPPAIP PRQPTSKAYS PRYSISDRTS ISDPPESPPL LPPREPVRTP DVFSSSPLHL QPPPLGKKSD HGN