Immunogen sequence: GEVPYKMVKG FSNRARKARL AEPQLREEND LGLFGYWQTE EYQPPVAVDG KVPRNEFGNV YLFLPSMMPI GCVQLNLPNL HRVARKLDID CVQAITGFDF HGGYSHPVTD GYIVCEEFKD VLLTAWENEQ AVIERKEKEK KEKRALGNWK LLAKGLLIRE RLKRRYGPKS EAAAPHTDAG GGLSSDEEEG TSSQAEAARI LAASWPQNRE DEE