Immunogen sequence: LLHWGALWRQ LASPCGAWAL RDTPIPRWKL SSAETYSRMR LKLVPNHHFD PHLEASALRD NLGEVPLTPT EEASLPLAVT KEAKVSTPPE LLQEDQLGED ELAELETPME AAELDEQREK LVLSAECQLV TVVAVVPGLL EVTTQNVYFY DGSTERVETE EGIGYDFRRP LAQLREVHLR RFNLRRSALE LFFIDQANYF LNFPCKVGTT PVS