Immunogen sequence: MEARSMLVPP QASVCFEDVA MAFTQEEWEQ LDLAQRTLYR EVTLETWEHI VSLGLFLSKS DVISQLEQEE DLCRAEQEAP RDWKATLEEN RLNSEKDRAR EELSHHVEVY RSGPEEPPSL VLGKVQDQSN QLREHQENSL RFMVLTSERL FAQREHCELE LGGGYSLPST LSLLPTTLPT STGFPKPNSQ VKELKQNSAF INHEKNGADG KHC