Immunogen sequence: MTLAAYKEKM KELPLVSLFC SCFLADPLNK SSYKYEGWCG RQCRRKDESQ RKDSADWRER RAQADTVDLN WCVISDMEVI ELNKCTSGQS FEVILKPPSF DGVPEFNASL PRRRDPSLEE IQKKLEAAEE RRKYQEAELL KHLAEKREHE REVIQKAIEE NNNFIKMAKE KLAQKMESNK ENREAHLAAM LERLQEKDKH AEEVRKNKEL KEE