Immunogen sequence: DYMKRLHSMS QETIHRNLAR GEKRLQREKS EQVLDNPEDL RGPIHLSVLR QGKSPYKRGF DEGDVHPQAK KKKIDLIFKD VLEASLESAK VEAHQLALST SLVIRKVPKY QDDAYSQCAT TMTHGVQNIG QTQGEGDWKV PQGVSKEPGQ LEDEEEEPSS FKADSPAEAS LASDPHELPT TSFCPNCIRL KKKVRELQAE LDMLKSGKLP EPP