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Recombinant Human IFN-alpha H2/IFNA14 Protein, CF

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Recombinant Human IFN-alpha H2/IFNA14 (Catalog # 11019-IF) demonstrates anti-viral activity in HeLa human cervical epithelial carcinoma cells infected with encephalomyocarditis (EMC) virus. The ED50 for this effect is ...read more
1 μg/lane of Recombinant Human IFN-alpha H2/IFNA14 Protein (Catalog # 11019-IF) was resolved with SDS-PAGE under reducing (R) and non-reducing (NR) conditions and visualized by silver staining, showing bands at 22-26 ...read more

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Summary
Applications Bioactivity
Format
Carrier-Free

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Recombinant Human IFN-alpha H2/IFNA14 Protein, CF Summary

Details of Functionality
Measured in anti-viral assays using HeLa human cervical epithelial carcinoma cells infected with encephalomyocarditis (EMC) virus. Meager, A. (1987) in Lymphokines and Interferons, a Practical Approach. Clemens, M.J. et al. (eds): IRL Press. 129. The ED50 for this effect is 1.50-15.0 pg/mL.
Source
Human embryonic kidney cell, HEK293-derived IFN-alpha H2/IFNA14 protein
Cys24-Asp189
Accession #
N-terminal Sequence
Cys24
Protein/Peptide Type
Recombinant Proteins
Purity
>95%, by SDS-PAGE under reducing conditions and visualized by silver stain.
Endotoxin Note
<0.10 EU per 1 μg of the protein by the LAL method.

Applications/Dilutions

Dilutions
  • Bioactivity
Theoretical MW
20 kDa.
Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.
SDS-PAGE
22-26 kDa, under reducing conditions.

Packaging, Storage & Formulations

Storage
Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  • 12 months from date of receipt, -20 to -70 °C as supplied.
  • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
  • 3 months, -20 to -70 °C under sterile conditions after reconstitution.
Buffer
Lyophilized from a 0.2 μm filtered solution in PBS.
Purity
>95%, by SDS-PAGE under reducing conditions and visualized by silver stain.
Reconstitution Instructions
Reconstitute at 100 μg/mL in PBS.

Notes

This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.

Alternate Names for Recombinant Human IFN-alpha H2/IFNA14 Protein, CF

  • IFNA14
  • IFNalpha H2
  • IFN-alpha H2
  • IFN-alpha-14
  • IFN-alphaH
  • interferon alpha-14
  • Interferon alpha-H
  • Interferon lambda-2-H
  • interferon, alpha 14
  • LeIF H
  • LEIF2H
  • MGC125756
  • MGC125757

Background

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). Structurally, type I IFNs belong to the class of five helical‑bundle cytokines, with the IFNA subtypes containing 2 conserved disulfide bonds (5). The extracellular domain (ECD) of mature human IFNA14, shares 58% aa sequence identity with mouse IFNA14. The type I IFNs bind to the interferon alpha receptor (IFNAR), which consists of two subunits: IFNAR1 (alpha‑subunit) and IFNAR2 (beta-subunit) (6, 7). Individual IFNA subtypes are known to display unique efficacies to viral protection, and IFNA14 has been shown to be a strong inducer of IFN-stimulated genes and anti-viral protection (8). IFNA14 has been shown to be potent against HIV-1 by up‑regulating the transcription of two intrinsic restriction factors with well-established anti-HIV-1 activity, MX2 and tetherin (9).
  1. Pestka, S. et al. (1987) Annu Rev Biochem. 56:727.
  2. Goeddel, D.V. et al. (1980) Nature 287:411.
  3. Matsumiya, T. et al. (2007) J. Immunol. 179:4542.
  4. Schreiber, G. and J. Piehler (2015) Trends Immunol. 36:139.
  5. Wittling, M.C. et al. (2021) Front Immunol. 11:605673.
  6. van Pesch, V. et al. (2004) J. Virol. 78:8219.
  7. James, C.M. et al. (2007) Vaccine. 25(10):1856.
  8. Moll, H.P. et al. (2011) Cytokine. 53:52.
  9. Lavender, K.J. et al. (2016) J Virol. 90:6001.

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