Immunogen sequence: MSKVFKKTSS NGKLSIYLGK RDFVDHVDTV EPIDGVVLVD PEYLKCRKLF VMLTCAFRYG RDDLEVIGLT FRKDLYVQTL QVVPAESSSP QGPLTVLQER LLHKLGDNAY PFTLQMVTNL PCSVTLQPGP EDAGKPCGID FEVKSFCAEN PEETVSKRDY VRLVVRKVQF APPEAGPGPS AQTIRRFLLS AQPLQLQAWM DREVHYHGEP ISV