Recombinant Human IFN-α2 (carrier-free)

Pricing & Availability
Regulatory Status
RUO
Other Names
IFN-alpha 2B, IFN-alphaA, IFNA2, IFNA2B
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Product Citations
publications
Human_IFNa2_CF_RECOM_1_100124
Recombinant human IFN-α2 induces CCL2 (MCP-1) production in U937 cells in a dose dependent manner. The ED50 of this effect is 0.02 - 0.14 ng/mL
  • Human_IFNa2_CF_RECOM_1_100124
    Recombinant human IFN-α2 induces CCL2 (MCP-1) production in U937 cells in a dose dependent manner. The ED50 of this effect is 0.02 - 0.14 ng/mL
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592702 10 µg $147
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592704 25 µg $253
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592706 100 µg $686
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592708 500 µg $1858
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Description

Interferons are divided into type I, II, and III. Type I IFNs (IFN-α and IFN-β) are most abundant in number, distribution, and expression. Also, they are highly conserved among mammals in both structure and function. IFN-α2 has been used in the treatment of cancer such as bladder cancer, hepatocellular carcinoma, and leukemia. IFN-α2 augments the suppressed immune functions in patients with head and neck squamous cell carcinoma (HNSCC). IFN-α2 initiated T and NK cell mediated cytotoxicity of tumor cells through IFNγ dependent and independent mechanisms. IFN-α2 enhances suppressed T cell cytotoxicity by stimulation of the perforin-granzyme B system (IFNγ dependent). Also, IFN-α2 induces the expression of perforin-granzyme B in NK cells (NK mediated cytotoxicity, IFNγ independent). In a preliminary study, IFN-α2 appears to be an effective immunostimulator and impacts the clinical outcome in tongue squamous cell carcinoma patients. IFN-α had been used in the treatment of chronic hepatitis C (CHC); nevertheless, IFN-α is relatively unstable and requires frequent parenteral administration. Pegylation of IFN-α, polyethylene glycol (PEG)-IFN-α, reduces in vitro activity but increase the stability and plasma half-life of IFN-α; therefore, PEG-IFN-α has replaced IFN-α in CHC treatment.

Product Details
Technical data sheet

Product Details

Source
Human IFN-α2, amino acids Cys24-Glu188 (Accession# NM_000605) was expressed in E.coli.
Molecular Mass
The 166 amino acid recombinant protein has a predicted molecular mass of approximately 19.4 kD. The DTT-reduced and non-reduced proteins migrate at approximately 20 kD and 18 kD respectively by SDS-PAGE. The N-terminal amino acid is Met.
Purity
>95%, as determined by Coomassie stained SDS-PAGE.
Formulation
0.22 µm filtered protein solution is in PBS, pH 7.2.
Endotoxin Level
Less than 0.01 ng per µg cytokine as determined by the LAL method.
Concentration
10 and 25 µg sizes are bottled at 200 µg/mL. 100 µg size and larger sizes are lot-specific and bottled at the concentration indicated on the vial. To obtain lot-specific concentration and expiration, please enter the lot number in our Certificate of Analysis online tool.
Storage & Handling
Unopened vial can be stored between 2°C and 8°C for up to 2 weeks, at -20°C for up to six months, or at -70°C or colder until the expiration date. For maximum results, quick spin vial prior to opening. The protein can be aliquoted and stored at -20°C or colder. Stock solutions can also be prepared at 50 - 100 µg/mL in appropriate sterile buffer, carrier protein such as 0.2 - 1% BSA or HSA can be added when preparing the stock solution. Aliquots can be stored between 2°C and 8°C for up to one week and stored at -20°C or colder for up to 3 months. Avoid repeated freeze/thaw cycles.
Activity
Recombinant human IFN-α2 induces CCL2 (MCP-1) production in U937 cells in a dose dependent manner. The ED50 of this effect is 0.02 - 0.14 ng/mL.
Application

Bioassay

Application Notes

This recombinant protein is encoded by the human IFN-a2B isoform.


BioLegend carrier-free recombinant proteins provided in liquid format are shipped on blue-ice. Our comparison testing data indicates that when handled and stored as recommended, the liquid format has equal or better stability and shelf-life compared to commercially available lyophilized proteins after reconstitution. Our liquid proteins are verified in-house to maintain activity after shipping on blue ice and are backed by our 100% satisfaction guarantee. If you have any concerns, contact us at tech@biolegend.com.

Product Citations
  1. Zhang Z, et al. 2022. Cancer Gene Ther. 29:722. PubMed
  2. You J, et al. 2022. Liver Int. 42:1676. PubMed
  3. Xiang H, et al. 2022. Cancer Sci. 113:2513. PubMed
  4. Sun N, et al. 2020. Cell Rep. 108342:33. PubMed
  5. Zhou Y, et al. 2022. Front Immunol. 13:884399. PubMed
  6. Brazee PL, et al. 2020. J Clin Invest. 130:1301. PubMed
  7. Chang AY, et al. 2021. J Biol Chem. 297:101277. PubMed
  8. He Y, et al. 2022. J Exp Med. 219:. PubMed
  9. Guo J, et al. 2019. Cancer Immunol Res. 1.349305556. PubMed
  10. Maroun JW, et al. 2020. Mol Ther Oncolytics. 0.913888889. PubMed
  11. Stebbing J, et al. 2021. Sci Adv. 7:00. PubMed
  12. Burel J, et al. 2016. PLoS Pathog. 12: 1005839. PubMed

Antigen Details

Distribution

IFN-α is ubiquitously expressed.

Function
IFN-α stimulates cytotoxic T lymphocytes and natural killer cell function. IFN-α has immunomodulatory and antiviral properties. IFNα2a induces CXCL10 in human microvascular endothelial cells and pulmonary artery smooth muscle cells. It is induced by viral infection.
Interaction
Varieties of cells express the IFNα receptor (IFNAR).
Ligand/Receptor
IFNAR complex has two components, IFNAR1 and IFNAR2.
Biology Area
Immunology, Innate Immunity
Molecular Family
Cytokines/Chemokines
Antigen References

1. Bose A and Baral R. 2007. Immunol. Lett. 108:68.
2. Zhao W, et al. 2008. J. Immunol. 180:5483.
3. Badiger R, et al. 2012. Plos One 7:e46779.
4. Aghemo A, et al. 2010. Nat. Rev. Gastroenterol. Hepatol. 7:485.
5. Becker-Merok A, et al. 2013. Lupus 22:155.
6. Mukherjee KK, et al. 2012. Indian J. Med. Res. 136:54.

Gene ID
3440 View all products for this Gene ID
UniProt
View information about IFN-alpha2 on UniProt.org

Related FAQs

Why choose BioLegend recombinant proteins?

     • Each lot of product is quality-tested for bioactivity as indicated on the data sheet.
     • Greater than 95% Purity or higher, tested on every lot of product.
     • 100% Satisfaction Guarantee for quality performance, stability, and consistency.
     • Ready-to-use liquid format saves time and reduces challenges associated with reconstitution.
     • Bulk and customization available. Contact us.
     • Learn more about our Recombinant Proteins.

How does the activity of your recombinant proteins compare to competitors?

We quality control each and every lot of recombinant protein. Not only do we check its bioactivity, but we also compare it against other commercially available recombinant proteins. We make sure each recombinant protein’s activity is at least as good as or better than the competition’s. In order to provide you with the best possible product, we ensure that our testing process is rigorous and thorough. If you’re curious and eager to make the switch to BioLegend recombinants, contact your sales representative today!

What is the specific activity or ED50 of my recombinant protein?

The specific activity range of the protein is indicated on the product datasheets. Because the exact activity values on a per unit basis can largely fluctuate depending on a number of factors, including the nature of the assay, cell density, age of cells/passage number, culture media used, and end user technique, the specific activity is best defined as a range and we guarantee the specific activity of all our lots will be within the range indicated on the datasheet. Please note this only applies to recombinants labeled for use in bioassays. ELISA standard recombinant proteins are not recommended for bioassay usage as they are not tested for these applications.

Have your recombinants been tested for stability?

Our testing shows that the recombinant proteins are able to withstand room temperature for a week without losing activity. In addition the recombinant proteins were also found to withstand four cycles of freeze and thaw without losing activity.

Does specific activity of a recombinant protein vary between lots?

Specific activity will vary for each lot and for the type of experiment that is done to validate it, but all passed lots will have activity within the established ED50 range for the product and we guarantee that our products will have lot-to-lot consistency. Please conduct an experiment-specific validation to find the optimal ED50 for your system.

How do you convert activity as an ED50 in ng/ml to a specific activity in Units/mg?

Use formula Specific activity (Units/mg) = 10^6/ ED50 (ng/mL)

Go To Top Version: 4    Revision Date: 10/01/2024

For Research Use Only. Not for diagnostic or therapeutic use.

 

This product is supplied subject to the terms and conditions, including the limited license, located at www.biolegend.com/terms) ("Terms") and may be used only as provided in the Terms. Without limiting the foregoing, BioLegend products may not be used for any Commercial Purpose as defined in the Terms, resold in any form, used in manufacturing, or reverse engineered, sequenced, or otherwise studied or used to learn its design or composition without express written approval of BioLegend. Regardless of the information given in this document, user is solely responsible for determining any license requirements necessary for user’s intended use and assumes all risk and liability arising from use of the product. BioLegend is not responsible for patent infringement or any other risks or liabilities whatsoever resulting from the use of its products.

 

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