Immunogen sequence: WMQEPKTDQD EEHCRKVNEY LNNPPMPGAL GASGSSGHEL SALGGEGGLQ SLLGNMSHSQ LMQLIGPAGL GGLGGLGALT GPGLASLLGS SGPPGSSSSS SSRSQSAAVT PSSTTSSTRA TPAPSAPAAA SATSPSPAPS SGNGASTAAS PTQPIQLSDL QSILATMNVP AGPAGGQQVD LASVLTPEIM APILANADVQ ERLLPYLPSG ESL