Immunogen sequence: IGKAPLQRAL QVTVPHFLDW SGEALQPTRI RILNVHVPRL HLKFIAGFGV RLLAAANFTF KVFRAPEPLE LTLPVELLAD TRVTQSSIRT PVVSISACSL FSGHANEFDG SNSTSHALLV LVQKHIKAVL SNKLCLSISN LVQGVNVHLG TLIGLNPVGP ESQIRYSMVS VPTVTSDYIS LEVNAVLFLL GKPIILPTDA TPFVLPRHVG TEG