Immunogen sequence: MAEAMDLGKD PNGPTHSSTL FVRDDGSSMS FYVRPSPAKR RLSTLILHGG GTVCRVQEPG AVLLAQPGEA LAEASGDFIS TQYILDCVER NERLELEAYR LGPASAADTG SEAKPGALAE GAAEPEPQRH AGRIAFTDAD DVAILTYVKE NARSPSSVTG NALWKAMEKS SLTQHSWQSL KDRYLKHLRG QEHKYLLGDA PVSPSSQKLK RKA