Immunogen sequence: MPEFLEDPSV LTKDKLKSEL VANNVTLPAG EQRKDVYVQL YLQHLTARNR PPLPAGTNSK GPPDFSSDEE REPTPVLGSG AAAAGRSRAA VGRKATKKTD KPRQEDKDDL DVTELTNEDL LDQLVKYGVN PGPIVGTTRK LYEKKLLKLR EQGTESRSST PLPTISSSAE NTRQNGSNDS DRYSDNEEDS KIELKLEKRE PLKGRAKTPV TLK