Cat#:RP-3975H;Product Name:Recombinant Human IFN a 2b Protein, 20 kd PEG;Synonym:Interferon alpha 2b, IFNA, INFA2, MGC125764, MGC125765.;Description:Interferon-a 2b Protein produced in E.coli is a single, non-glycosylated, polypeptide chain containing 165 amino acids and having a molecular mass of 19269 Dalton. The Pegylated?IFN-a 2b is produced by attaching a 20kDa mPEG-aldehyde to the N-terminal IFN alpha-2b. Interferon-a 2b is purified by proprietary chromatographic techniques.;Source:E.coli;Purity:Greater than 97.0% as determined by SEC-HPLC.;Bioactivity:The specific activity as determined in a viral resistance assay using VSV-WISH cells was found to be 3,000,000 IU/mg.;Formulation:IFN-a 2b is supplied in solution (1.48mg/ml) containing 20mM Acetate Buffer (pH 6.0), 0.8%NaCl and 0.005% Polysorbate 80.;Stability:Recombinant Proteins are stable for up to 1 year from date of receipt at -70℃;Storage:IFN alpha-2b PEG should be stored refrigerated at 2° to 8°C. Vials should be kept in their?packaging to protect from light until the time of use. Shaking and freezing should be avoided.;