Immunogen sequence: QVSKVPSSLS QEQSEQDAIY QNLTQLKAAV GELSEKSKLQ EIYQELTQLK AAVGELPEKS KLQEIYQELT RLKAAVGELP EKSKLQEIYQ ELTRLKAAVG ELPEKSKLQE IYQELTRLKA AVGELPEKSK LQEIYQELTE LKAAVGELPE KSKLQEIYQE LTQLKAAVGE LPDQSKQQQI YQELTDLKTA FERLCRHCPK DWTFFQGNCY FMS