Immunogen sequence: ITQTFKDQGL EVLKQETAVV ENVPILGLYQ IPAEGGGRIV LYGDSNCLDD SHRQKDCFWL LDALLQYTSY GVTPPSLSHS GNRQRPPSGA GSVTPERMEG NHLHRYSKVL EAHLGDPKPR PLPACPRLSW AKPQPLNETA PSNLWKHQKL LSIDLDKVVL PNFRSNRPQV RPLSPGESGA WDIPGGIMPG RYNQEVGQTI PVFAFLGAMV VLA