Immunogen sequence: MACLHETRTP SPSFGGFVST LSEASMRKLD PDTSDCTPEK DLTPTQCVLR DVVPLGGQGG GGPSPSPGGE PPPEPFANSV LQLHEQDAGG PGGAAGSPES RASRVRADEV RLQCQSGSGF LEGLFGCLRP VWTMIGKAYS TEHKQQQEDL WEVPFEEILD LQWVGSGAQG AVFLGRFHGE EVAVKKVRDL KETDIKHLRK LKHPNIITFK; Po