Immunogen sequence: CFSLLALSFN ILLLVVICVT GSQSEGHGGA QLQAELRSLK EAFSNFSSST LTEVQAISTH GGSVGDKITS LGAKLEKQQQ DLKADHDALL FHLKHFPVDL RFVACQMELL HSNGSQRTCC PVNWVEHQGS CYWFSHSGKA WAEAEKYCQL ENAHLVVINS WEEQKFIVQH TNPFNTWIGL TDSDGSWKWV DGTDYRHNYK NWAVTQPDNW HGH