Recombinant Biotinylated Human IL-21 Protein,His-Avi Tag

Description :
Synonyms Za11; IL-21;Interleukin-21; Source Biotinylated Human IL-21 Protein is expressed from E.coli with His tag and Avi tag at the N-Terminus. It contains Gln32-Ser162.[Accession | Q9HBE4-1] Molecular Weight The protein has a predicted MW of 18.30 kDa same as SDS-PAGE result. 内毒素Endotoxin Less than 1EU per g by the LAL method. Purity > 95% as determined by SDS-PAGE Activity ELISA Data: Immobilized Human IL-21R, hFc Tag at 0.5g/ml (100l/Well) on the plate. Dose response curve for Biotinylated Human IL-21, His Tag with the EC50 of 2.5ng/ml determined by ELISA. Formulation Lyophilized from 0.22 m filtered solution in 20mM NaAc, 500mM NaCl (pH 5.5). Normally 8% trehalose is added as protectant before lyophilization. Reconstitution Centrifuge the tube before opening. Reconstituting to a concentration more than 100 g/ml is recommended. Dissolve the lyophilized protein in 20mM NaAc, 500mM NaCl (pH 5.5).