Immunogen sequence: QAIRFQKIRR QMEAPGAPPR TLTWEAMEQI RYLHEEFPES WSVPRLAEGF DVSTDVIRRV LKSKFLPTLE QKLKQDQKVL KKAGLAHSLQ HLRGSGNTSK LLPAGHSVSG SLLMPGHEAS SKDPNHSTAL KVIESDTHRT NTPRRRKGRN KEIQDLEESF VPVAAPLGHP RELQKYSSDS ESPRGTGSGA LPSGQKLEEL KAEEPDNFSS KVV