Immunogen sequence: MSAYPKSYNP FDDDGEDEGA RPAPWRDARD LPDGPDAPAD RQQYLRQEVL RRAEATAAST SRSLALMYES EKVGVASSEE LARQRGVLER TEKMVDKMDQ DLKISQKHIN SIKSVFGGLV NYFKSKPVET PPEQNGTLTS QPNNRLKEAI STSKEQEAKY QASHPNLRKL DDTDPVPRGA GSAMSTDAYP KNPHLRAYHQ KIDSNLDELS MGL