Immunogen sequence: HKGIREQGRY LNSRPSIQKP EVFFLPDLPT TPYFSRDAQK HDVEVLERNF QTILCEFETL YKAFSNCSLP QGWKMNSTPS GEWFTFYLVN QGVCVPRNCR KCPRTYRLLG SLRTCIGNNV FGNACISVLS PGTVITEHYG PTNIRIRCHL GLKTPNGCEL VVGGEPQCWA EGRCLLFDDS FL Highest antigen sequence identity