Human Interferon-alpha 2a Recombinant

• Background:

  All known subtypes of IFN-alpha show the same antiviral antiparasitic, antiproliferative activities. Human IFN-alpha is also a potent antiviral substance in murine, porcine, and bovine cell systems. IFN-alpha forms are produced by monocytes/macrophages, lymphoblastoid cells, fibroblasts, and a number of different cell types following induction by viruses, nucleic acids, glucocorticoid hormones, and low-molecular weight substances. All IFN-alpha subtypes possess a common conserved sequence region between amino acid positions 115-151 while the amino- terminal ends are variable. Many IFN-alpha subtypes differ in their sequences at only one or two positions. IFN-alpha and IFN-beta are thought to bind to the same receptor. Signal transduction mechanisms elicited after binding of IFN-alpha to its receptors involves tyrosine phosphorylation of various non-receptor tyrosine kinases belonging to the Janus kinases.

• Description:

  Recombinant Interferon alpha 2a is a disulfide-linked monomeric protein consisting of 166 amino acid residues, and migrates as an approximately 19 kDa protein under non-reducing conditions and reducing conditions. Optimized DNA sequence encoding Human Interferon-alpha mature chain was expressed inE. coli.

• UniProt:

  P01563

• Endotoxin:

  < 0.1 ng/µg (1 EU/µg), using the LAL gel clot method.

• Purity:

  ≥ 98% by SDS-PAGE and HPLC

• Format:

  Lyophilized protein

• Reconstitution:

  A quick spin of the vial followed by reconstitution in distilled water to a concentration not less than 0.1 mg/ml. This solution can then be diluted into other buffers.

• Shipping Conditions:

  Gel Packs or Dry Ice

• Storage Conditions:

  The lyophilized protein is stable for at least 2 years from date of receipt when stored at -20°C. Upon reconstitution, store in working aliquots at +4°C for up to one month, or at -20°C for up to six months, in the presence of a carrier protein. Avoid repeated freeze/thaw cycles.

• Calculated Molecular Weight:

  19 kDa

• Formulation:

  Lyophilized from 0.2 µm filtered PBS solution, pH 7.0.