Immunogen sequence: IKIRPVPEYQ KYGSVAFPNF EQGVACLREI AKQRCAPASI RLMDNKQFQF GHALKPQVSS IFTSFLDGLK KFYITKFKGF DPNQLSVATL LFEGDREKVL QHEKQVYDIA AKFGGLAAGE DNGQRGYLLT YVIAYIRDLA LEYYVLGESF ETSAPWDRVV DLCRNVKERI TRECKEKGVQ FAPFSTCRVT QTYDAGACIY FYFAFNYRGI SDP