Human Interferon-alpha 2b Recombinant

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Encompassing Amino Acids: 24-188

Amino Acid Sequence: CDLPQTHSLGSRRTLMLLAQMRKISLFSCLKDRHDFGFPQEEFGNQFQKAETIPVLHEMIQQIFNLFSTKDSSAAWDETLLDKFYTELYQQLNDLEACVIQGVGVTETPLMKEDSILAVRKYFQRITLYLKEKKYSPCAWEVVRAEIMRSFSLSTNLQESLRSKE

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.

Biological Activity: The ED₅₀ was determined by viral resistance assay and was found to be not less than 5x10⁸ IU/mg.

Description: Recombinant Interferon-alpha 2b is a disulfide-linked monomeric protein consisting of 166 amino acid residues. Interefron alpha 2b migrates as an approximately 19 kDa protein under non-reducing conditions and reducing conditions in SDS-PAGE. Optimized DNA sequence encoding Human Interferon-alpha mature chain was expressed in E. coli.

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

Format: lyophilized protein

Formulation: Lyophilized from 0.2 µm filtered PBS solution, pH 7.0.

Genbank: P01563

Purity: ≥98% by SDS-PAGE and HPLC

Reconstitution: Reconstitute at 0.1-1.0 mg/ml in distilled water. This solution can then be diluted into other buffers. To maximize product collection from vial surface, vortex briefly and then spin down to recollect the liquid.

Storage Stability: 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.

Uniprot: P01563

Warnings: Avoid freeze/thaw cycles.

Biosafety Level: Not applicable (BSL-1)

References: 1. J. Biol. Chem., Sep 2009, 284: 25051 - 25064.
2. J. Biol. Chem., Sep 2009, 284: 24328 - 24340.

• Artikelnummer: BPS90159-B
• Hersteller: BPS Bioscience
• Hersteller Artikelnummer: 90159-B
• Verpackungseinheit: 100 µg
• Mengeneinheit: STK