Immunogen sequence: DASCAANNPS LKLTYTECLR VCGNWLAETC LENPAVIMQT YLEKAVEVAG NYDGESSDEL RNGKMKAFLS LARFSDTQYQ RIENYMKSSE FENKQALLKR AKEEVGLLRE HKIQTNRYTV KVQRELELDE LALRALKEDR KRFLCKAVEN YINCLLSGEE HDMWVFRLCS LWLENSGVSE VNGMMKRDGM KIPTYKFLPL MYQLAARMGT KMM