Immunogen sequence: MSGGAAEKQS STPGSLFLSP PAPAPKNGSS SDSSVGEKLG AAAADAVTGR TEEYRRRRHT MDKDSRGAAA TTTTTEHRFF RRSVICDSNA TALELPGLPL SLPQPSIPAA VPQSAPPEPH REETVTATAT SQVAQQPPAA AAPGEQAVAG PAPSTVPSST SKDRPVSQPS LVGSKEEPPP ARSGSGGGSA KEPQEERSQQ QDDIEELETK; Po