Immunogen sequence: ASLQVLEMES METAAAGSAG LAAEVRGSGT VDFGPGPGIS AMEASGGDPG PEAEDFECSS HCSELSWRQN EQRRQGLFCD ITLCFGGAGG REFRAHRSVL AAATEYFTPL LSGQFSESRS GRVEMRKWSS EPGPEPDTVE AVIEYMYTGR IRVSTGSVHE VLELADRFLL IRLKEFCGEF LKKKLHLSNC VAIHSLAHMY TLSQLALKAA DMI