Immunogen sequence: MSRQAKDDFL RHYTVSDPRT HPKGYTEYKV TAQFISKKDP EDVKEVVVWK RYSDFRKLHG DLAYTHRNLF RRLEEFPAFP RAQVFGRFEA SVIEERRKGA EDLLRFTVHI PALNNSPQLK EFFRGGEVTR PLEVSRDLHI LPPPLIPTPP PDDPRLSQLL PAERRGLEEL EVPVDPPPSS PAQEALDLLF NCESTEEASG SPARGPLTEA ELA