Immunogen sequence: TFEAMELIGK PKPYYEIGER VDYKCKKGYF YIPPLATHTI CDRNHTWLPV SDDACYRETC PYIRDPLNGQ AVPANGTYEF GYQMHFICNE GYYLIGEEIL YCELKGSVAI WSGKPPICEK VLCTPPPKIK NGKHTFSEVE VFEYLDAVTY SCDPAPGPDP FSLIGESTIY CGDNSVWSRA APECKVVKCR FPVVENGKQI SGFGKKFYYK ATV