Immunogen sequence: MGGEQEEERF DGMLLAMAQQ HEGGVQELVN TFFSFLRRKT DFFIGGEEGM AEKLITQTFS HHNQLAQKTR REKRARQEAE RREKAERAAR LAKEAKSETS GPQIKELTDE EAERLQLEID QKKDAENHEA QLKNGSLDSP GKQDTEEDEE EDEKDKGKLK PNLGNGADLP NYRWTQTLSE LDLAVPFCVN FRLKGKDMVV DIQRRHLRVG LKG