Immunogen sequence: YVSPQDVTTM QTCNTKFPGP KSIPDYWDSS ALPDPGFQKI TLSSSSEEYQ KVWNLFNRTL PFYFVQKIER VQNLALWEVY QWQKGQMQKQ NGGKAVDERQ LFHGTSAIFV DAICQQNFDW RVCGVHGTSY GKGSYFARDA AYSHHYSKSD TQTHTMFLAR VLVGEFVRGN ASFVRPPAKE GWSNAFYDSC VNSVSDPSIF VIFEKHQVYP EYV