Immunogen sequence: ALSNVEGFER LICNQKKENE TRVVLCELGN PMKKNAQIGI AMLVSVGNLE EAGESVSFQL QIRSKNSQNP NSKIVLLDVP VRAEAQVELR GNSFPASLVV AAEEGEREQN SLDSWGPKVE HTYELHNNGP GTVNGLHLSI HLPGQSQPSD LLYILDIQPQ GGLQCFPQPP VNPLKVDWGL PIPSPSPIHP AHHKRDRRQI FLPEPEQPSR LQD