Immunogen sequence: MVVTRSARAK ASIQAASAES SGQKSFAANG IQAHPESSTG SDARTTAESQ TTGKQSLIPR TPKARKRKSR TTGSLPKGTE PSTDGETSEA ESNYSVSEHH DTILRVTRRR QILIACSPVS SVRKKPKVTP TKESYTEEIV SEAESHVSGI SRIVLPTEKT TGARRSKAKS LTDPSQESHT EAISDAETSS SDISFSGIAT RRTRSMQRKL KAQ