Immunogen sequence: MTLLTFRDVA IEFSLEEWKC LDLAQQNLYR DVMLENYRNL FSVGLTVCKP GLITCLEQRK EPWNVKRQEA ADGHPEMGFH HATQACLELL GSSDLPASAS QSAGITGVNH RAQPGLNVSV DKFTAMSSHF TQDLLPEQGI QDAFPKRILR GYGNCGLDNL YLRKDWESLD ECKLQKDYNG LNQCSSTTHS KIFQYNKYVK IFDNFSNLHR RNI