Immunogen sequence: LECYSCVQKA DDGCSPNKMK TVKCAPGVDV CTEAVGAVET IHGQFSLAVR GCGSGLPGKN DRGLDLHGLL AFIQLQQCAQ DRCNAKLNLT SRALDPAGNE SAYPPNGVEC YSCVGLSREA CQGTSPPVVS CYNASDHVYK GCFDGNVTLT AANVTVSLPV RGCVQDEFCT RDGVTGPGFT LSGSCCQGSR CNSDLRNKTY FSPRIPPLVR LPP