| Species : | Human | 
                                
                                    | Source : | HEK293 | 
                                
                                    | Tag : | Fc | 
                                
                                    | Protein Length : | Met1-Pro236 | 
                                
                                    | Form : | Lyophilized from sterile PBS, pH 7.4.Please contact us for any concerns or special requirements. Normally 5 % - 8 % trehalose, mannitol and 0.01% Tween80 are added as protectants before lyophilization. Please refer to the specific buffer information in the hard copy of CoA. | 
                                
                                    | Bio-activity : | 1. Measured by its ability to inhibit IL21-induced Interferon gamma secretion by human natural killer lymphoma NK-92 cells. The ED50 for this effect is typically 40-200 ng/mL in the presence of 2 ng/mL of recombinant human IL21.2. Immobilized Recombinant Human Interleukin-21 / IL-21 Protein(Cat:GMP-10584-HNAE) at 2μg/mL (100μL/well) can bind Recombinant Human IL-21R / Il21R Protein (Fc Tag)(Cat:11483-H02H), the EC50 is 130-480 ng/mL. | 
                                
                                    | Molecular Mass : | The recombinant human IL21R consists of 458 amino acids and predicts a molecular mass of 52 kDa. | 
                                
                                    | Endotoxin : | < 1.0 EU per μg protein as determined by the LAL method. | 
                                
                                    | Purity : | > 90 % as determined by SDS-PAGE. | 
                                
                                    | Storage : | Samples are stable for up to twelve months from date of receipt at -20°C to -80°C Store it under sterile conditions at -20°C to -80°C. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.
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                                    | Reconstitution : | It is recommended that sterile water be added to the vial to prepare a stock solution of 0.2 ug/ul. Centrifuge the vial at 4°C before opening to recover the entire contents. |