Cat#:RP-1690H;Product Name:Recombinant Human Interleukin-21 / IL-21 Protein;Synonym:CVID11,IL-21,Za11;Description:A DNA sequence encoding the mature form of human IL-21 isoform 1 (Q9HBE4-1) (Gln 23-Ser 155) was expressed and purified, with an initial Met.;Source:E. coli;Predicted N Terminal:Met;Molecular Characterization:The recombinant human IL-21 consisting of 134 amino acids and has a calculated molecular mass of 15.6 kDa. It migrates as an approximately 17 kDa band in SDS-PAGE under reducing conditions.;Purity:Greater than 92 % as determined by SDS-PAGE;Endotoxin:Please contact us for more information.;Bioactivity:Please contact us for detailed information;Formulation:Lyophilized from sterile 20mM NaAc, 150mM NaCl, pH 5.5;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℃).;