Immunogen sequence: MPAVASVPKE LYLSSSLKDL NKKTEVKPEK ISTKSYVHSA LKIFKTAEEC RLDRDEERAY VLYMKYVTVY NLIKKRPDFK QQQDYFHSIL GPGNIKKAVE EAERLSESLK LRYEEAEVRK KLEEKDRQEE AQRLQQKRQE TGREDGGTLA KGSLENVLDS KDKTQKSNGE KNEKCETKEK GAITAKELYT MMTDKNISLI IMDARRMQDY QDS