Immunogen sequence: HSLFLRRMRA PSKPWSQVDE ATIRAIIAVL STEEQSAGLQ QPSGIGQRPR PMSSEELPLA SSWRSNNSRK SSADTEFSDE CTTAERVLMK SPSPALHPPQ KYKDRGILHP KRGTEDRSDQ SSLKSTDSSS YPSPCASPSP PSSGKGSKSP SPRPNMPVRY FIMKSSNLRN LEISQQKGIW STTPSNERKL NRAFWESSIV YLVFSVQGSG HFQ