Immunogen sequence: KSGGASHSEL IHNLRKNGII KTDKVFEVML ATDRSHYAKC NPYMDSPQSI GFQATISAPH MHAYALELLF DQLHEGAKAL DVGSGSGILT ACFARMVGCT GKVIGIDHIK ELVDDSVNNV RKDDPTLLSS GRVQLVVGDG RMGYAEEAPY DAIHVGAAAP VVPQALIDQL KPGGRLILPV GPAGGNQMLE QYDKLQDGSI KMKPLMGVIY VPL