Immunogen sequence: MSGFSTEERA APFSLEYRVF LKNEKGQYIS PFHDIPIYAD KDVFHMVVEV PRWSNAKMEI ATKDPLNPIK QDVKKGKLRY VANLFPYKGY IWNYGAIPQT WEDPGHNDKH TGCCGDNDPI DVCEIGSKVC ARGEIIGVKV LGILAMIDEG ETDWKVIAIN VDDPDAANYN DINDVKRLKP GYLEATVDWF RRYKVPDGKP ENEFAFNAEF KDK