Immunogen sequence: ESAGADTRPT VRPRNDVAHK QLSAFGEYVA EILPKYVQQV QVSCFNELEV CIHPDGVIPV LTFLRDHTNA QFKSLVDLTA VDVPTRQNRF EIVYNLLSLR FNSRIRVKTY TDELTPIESA VSVFKAANWY EREIWDMFGV FFANHPDLRR ILTDYGFEGH PFRKDFPLSG YVELRYDDEV KRVVAEPVEL AQEFRKFDLN SPWEAFPVYR QPP