Immunogen sequence: QVDTTKAVIT LQPPWVSVFQ EETVTLHCEV LHLPGSSSTQ WFLNGTATQT STPSYRITSA SVNDSGEYRC QRGLSGRSDP IQLEIHRGWL LLQVSSRVFT EGEPLALRCH AWKDKLVYNV LYYRNGKAFK FFHWNSNLTI LKTNISHNGT YHCSGMGKHR YTSAGISVTV KELFPAPVLN ASVTSPLLEG NLVTLSCETK LLLQRPGLQL YFS