Immunogen sequence: QRQKLEKNKE RYEAAIQRSV KKTWAEIRQQ RWSWAGALHH SSPGHKTSGS RCSVSAVNLP KHVDSIINKR LSKSSATLWN SPSRNRSLQL SAWESSIVDR LMTPTLSFLA RSRSAVTLPR NGRDQGRGCD PGRGPTWGRA GASLARGPQP DRTHPSAAVP VCPRSASASP LTPCSVTRSV HRCAPAGERG ERRKPNAGGS PAPVRRRPEA SPV