Immunogen sequence: EDLCRAPDGK KGEAGRPGRR GRPGLKGEQG EPGAPGIRTG IQGLKGDQGE PGPSGNPGKV GYPGPSGPLG ARGIPGIKGT KGSPGNIKDQ PRPAFSAIRR NPPMGGNVVI FDTVITNQEE PYQNHSGRFV CTVPGYYYFT FQVLSQWEIC LSIVSSSRGQ VRRSLGFCDT TNKGLFQVVS GGMVLQLQQG DQVWVEKDPK KGHIYQGSEA DSV