Immunogen sequence: RNLYINNELQ DFTKTQMKPG VVPGCEPCRK LYCLHGICQP NATPGPMCHC EAGWVGLHCD QPADGPCHGH KCVHGQCVPL DALSYSCQCQ DGYSGALCNQ AGALAEPCRG LQCLHGHCQA SGTKGAHCVC DPGFSGELCE QESECRGDPV RDFHQVQRGY AICQTTRPLS WVECRGSCPG QGCCQGLRLK RRKFTFECSD GTSFAEEVEK PTK