Immunogen sequence: MATTAQYLPR GPGGGAGGTG PLMHPDAAAA AAAAAAAERL HAGAAYREVQ KLMHHEWLGA GAGHPVGLAH PQWLPTGGGG GGDWAGGPHL EHGKAGGGGT GRADDGGGGG GFHARLVHQG AAHAGAAWAQ GSTAHHLGPA MSPSPGASGG HQPQPLGLYA QAAYPGGGGG GLAGMLAAGG GGAGPGLHHA LHEDGHEAQL EPSPPPHLGA HGH