Immunogen sequence: MAEKPKLHYS NIRGRMESIR WLLAAAGVEF EEKFIKSAED LDKLRNDGYL MFQQVPMVEI DGMKLVQTRA ILNYIASKYN LYGKDIKEKA LIDMYIEGIA DLGEMILLLP FSQPEEQDAK LALIQEKTKN RYFPAFEKVL KSHGQDYLVG NKLSRADIHL VELLYYVEEL DSSLISSFPL LKALKTRISN LPTVKKFLQP GSPRKPPMDE KSL