Immunogen sequence: MAASRWARKA VVLLCASDLL LLLLLLPPPG SCAAEGSPGT PDESTPPPRK KKKDIRDYND ADMARLLEQW EKDDDIEEGD LPEHKRPSAP VDFSKIDPSK PESILKMTKK GKTLMMFVTV SGSPTEKETE EITSLWQGSL FNANYDVQRF IVGSDRAIFM LRDGSYAWEI KDFLVGQDRC ADVTLEGQVY PGKGGGSKEK NKTKQDKGKK KKE