Cat#:RP-0254H;Product Name:Recombinant Human CD137 / 4-1BB / TNFRSF9 Protein (His Tag);Synonym:4-1BB,CD137,CDw137,ILA;Description:A DNA sequence encoding the human 4-1BB extracellular domain (NP_001552.2) (Met 1-Gln 186) was fused with a polyhistidine tag at the C-terminus.;Source:Human Cells;Predicted N Terminal:Leu 24;Molecular Characterization:The recombinant human 4-1BB consists of 174 amino acids and has a calculated molecular mass of 18.8 kDa. By SDS-PAGE under reducing conditions, the apparent molecular mass of rh4-1BB is approximately 33-36 kDa due to glycosylation.;Purity:Greater than 85 % as determined by SDS-PAGE;Endotoxin:< 1.0 EU per ug of the protein as determined by the LAL method;Bioactivity:Please contact us for detailed information;Formulation:Lyophilized from sterile PBS, pH 7.4;Stability:Recombinant Proteins are stable for up to 1 year from date of receipt at -70℃;Reconstitution:Please see related COA for specific instructions.;Storage:Avoid repeated freeze-thaw cycles. In lyophilized state for 1 year (4-8℃); Upon reconstitution under sterile conditions for 2 weeks (4-8℃) or 3 months (-20℃ to -70℃).;