Recombinant Human IFN-alpha-2A Protein, CF Summary
CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.
In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.
|Formulation||Lyophilized from a 0.2 μm filtered solution in PBS.|
|Reconstitution||Reconstitute at 100 μg/mL in PBS.|
|Shipping||The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.|
|Stability & Storage:||Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
Recombinant Human IFNA-2A (Catalog # 10984-IF) demonstrates anti-viral activity in HeLa human cervical epithelial carcinoma cells infected with encephalomyocarditis (EMC) virus. The ED50 for this effect is 3.00-30.0 pg/mL
2 μg/lane of Recombinant Human IFN-alpha-2A Protein (Catalog # 10984-IF) was resolved with SDS-PAGE under reducing (R) and non-reducing (NR) conditions and visualized by Coomassie® Blue staining, showing bands at 18-24 kDa.
Interferons (IFN) are a family of cytokines with potent antiviral, antiproliferative and immunomodulatory properties, classified based on their binding specificity to cell surface receptors (1). Human IFNA2 was originally cloned in the early ‘80s and now more than a dozen closely related IFN alpha subtypes have been identified in both the human and mouse genome, each sharing about 80%amino acid (aa) sequence homology (2 - 4). There are several variants of human IFNA2, IFNA2a, IFNA2b and IFNA2c, which only differ by a few point mutations (5). The extracellular domain (ECD) of mature human IFNA2A, shares 59% aa sequence identity with mouse IFNA2. The type I IFNs bind to t e interferon alpha receptor (IFNAR), which consists of two subunits: IFNAR1 (alpha -subunit) and IFNAR2 (beta -subunit) (6, 7). While individual IFN alpha subtypes are known to display unique efficacies to viral protection, nothing is known about functions unique to IFNA2 in human physiology. However, IFNA2 has become the representative type I IFN subtype used in basic research and numerous clinical applications (8). Since being first approved for treatment of hairy cell leukemia in 1986, IFNA2a has been approved for the treatment of several malignancies including AIDS-related Kaposi's sarcoma, chronic hepatitis C and chronic myelogenous leukemia (9).
- Pestka, S. et al. (1987) Annu Rev Biochem. 56:727.
- Goeddel, D.V. et al. (1980) Nature 287:411.
- Matsumiya, T. et al. (2007) J. Immunol. 179:4542.
- Schreiber, G. and J. Piehler (2015) Trends Immunol. 36:139.
- Lee, N. et al. (1995) J. Interferon Cytokine Res. 15:341.
- van Pesch, V. et al. (2004) J. Virol. 78:8219.
- James, C.M. et al. (2007) Vaccine. 25(10):1856.
- Paul, F. et al. (2015) Gene. 567:132.
- Kiladjian, J.J. et al. (2008) Leukemia 22:1990.
Citation for Recombinant Human IFN-alpha-2A Protein, CF
R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.
1 Citation: Showing 1 - 1
Internal RNA 2'O-methylation in the HIV-1 genome counteracts ISG20 nuclease-mediated antiviral effect
Authors: PE Kazzi, N Rabah, C Chamontin, L Poulain, F Ferron, F Debart, B Canard, D Missé, B Coutard, S Nisole, E Decroly
Nucleic Acids Research, 2022;0(0):.
Sample Types: Whole Cells
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