Residues: Glu19~Asp244 (Accession # P08661), with N-terminal His-Tag. Grade & Purity: >95%, 25 kDa as determined by SDS-PAGE reducing conditions. The target protein is fused with N-terminal His-Tag, its sequence is listed below. MGHHHHHHSGS-ET LTEGAQSSCP VIACSSPGLN GFPGKDGHDG AKGEKGEPGQ GLRGLQGPPG KVGPAGPPGN PGSKGATGPK GDRGESVEFD TTNIDLEIAA LRSELRAMRK WVLLSMSENV GKKYFMSSVR RMPLNRAKAL CSELQGTVAT PRNAEENRAI QNVAKDVAFL GITDQRTENV FEDLTGNRVR YTNWNEGEPN NVGSGENCVV LLTNGKWNDV PCSDSFLVVC EFSD