| Species : | Human | 
                                
                                    | Source : | HEK293 | 
                                
                                    | Tag : | His | 
                                
                                    | Protein Length : | Met1-Val346 | 
                                
                                    | Form : | Lyophilized from sterile PBS, pH 7.4Please contact us for any concerns or special requirements. Normally 5 % - 8 % trehalose, mannitol and 0.01% Tween80 are added as protectants before lyophilization. | 
                                
                                    | Bio-activity : | Measured by its ability to inhibit Wnt3a-induced alkaline phosphatase production by C3H10T 1/2 2A6 mouse embryonal fibroblast cells.The ED50 for this effect is typically 1-6 μg/mL in the presence of 20 ng/mL of Wnt3a. | 
                                
                                    | Molecular Mass : | The recombinant human sFRP4 consists of 336 amino acids after removal of the signal peptide and has a predicted molecular mass of 39 kDa. In SDS-PAGE under reducing conditions, it migrates with an apparent molecular mass of 55-60 kDa due to glycosylation. | 
                                
                                    | Endotoxin : | < 1.0 EU per μg of the 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. |