Immunogen sequence: SGLLQRRRKW RSQLKAFYDR ESENPLEMFE TVPVWRRQPV RVLSLFEDIK KELTSLGFLE SGSDPGQLKH VVDVTDTVRK DVEEWGPFDL VYGATPPLGH TCDRPPSWYL FQFHRLLQYA RPKPGSPRPF FWMFVDNLVL NKEDLDVASR FLEMEPVTIP DVHGGSLQNA VRVWSNIPAI RSRHWALVSE EELSLLAQNK QSSKLAAKWP TKL