Immunogen sequence: AAPSSVPRGR QLPGRLGCLL EEGLCGASEA CVNDGVFGRC QKVPAMDFYR YEVSPVALQR LRVALQKLSG TGFTWQDDYT QYVMDQELAD LPKTYLRRPE ASSPARPSKH SVGSERRYSR EGGAALANAL RRHLPFLEAL SQAPASDVLA RTHTAQDRPP AEGDDRFSES ILTYVAHTSA LTYPPGSRTQ LREDLLPRTL GQLQPDELSP KVD