Immunogen sequence: MVKIVTVKTQ AYQDQKPGTS GLRKRVKVFQ SSANYAENFI QSIISTVEPA QRQEATLVVG GDGRFYMKEA IQLIARIAAA NGIGRLVIGQ NGILSTPAVS CIIRKIKAIG GIILTASHNP GGPNGDFGIK FNISNGGPAP EAITDKIFQI SKTIEEYAVC PDLKVDLGVL GKQQFDLENK FKPFTVEIVD SVEAYATMLR SIFDFSALKE LLS