Immunogen sequence: KSTGDPKGFA FVEFETKEQA AKAIEFLNNP PEEAPRKPGI FPKTVKNKPI PALRVVEEKK KKKKKKGRMK KEDNIQAKEE NMDTSNTSIS KMKRSRPTSE GSDIESTEPQ KQCSKKKKKR DRVEASSLPE VRTGKRKRSS SEDAESLAPR SKVKKIIQKD IIKEASEASK ENRDIEISTE EEKDTGDLKD SSLLKTKRKH KKKHKERHKM GEE