View Featured Offers >>
Human Interferon-α1 (hIFN-α1)
Cytokines & Growth Factors
Growth Factors and Cytokines

Human Interferon-α1 (hIFN-α1) #8927

Citations (3)
Human Interferon-α1 (hIFN-α1): Image 1
The bioactivity of recombinant hIFN-α1 was determined in a virus protection assay. HeLa cells were pretreated with increasing concentrations of hIFN-α1 for 24 hours. Cells were then inoculated with encephalomyocarditis virus (EMCV) and incubated for an additional 48 hours. Surviving cells were then fixed and stained with crystal violet and the OD595 was determined.
Human Interferon-α1 (hIFN-α1): Image 2
The purity of recombinant hIFN-α1 was determined by SDS-PAGE of 6 µg reduced (+) and non-reduced (-) recombinant hIFN-α1 and staining overnight with Coomassie Blue.
Human Interferon-α1 (hIFN-α1): Image 3
Western blot analysis of extracts from HeLa cells, untreated or treated with hIFN-α1 for 15 minutes, using Phospho-Stat1 (Tyr701) Antibody #9171 (upper) and Stat1 Antibody #9172 (lower).


With carrier: Lyophilized from a 0.22 μm filtered solution of PBS, pH 7.2 containing 20 μg BSA per 1 μg hIFN-α1. Carrier free: Lyophilized from a 0.22 μm filtered solution of PBS, pH 7.2.


Stable in lyophilized state at -20°C for 1 year after receipt. Sterile stock solutions reconstituted with carrier protein are stable at 4°C for 2 months and at -20°C for 6 months. Avoid repeated freeze-thaw cycles. Maintain sterility. Storage at -20°C should be in a manual defrost freezer.

Product Description

MW (kDa) 18
Purity >98% as determined by SDS-PAGE of 6 μg reduced (+) and non-reduced (-) recombinant hIFN-α1. All lots are greater than 98% pure.
Endotoxin Less than 0.01 ng endotoxin/1 μg hIFN-α1.
Activity The bioactivity of hIFN-α1 was determined in a virus protection assay. The ED50 of each lot is between 0.01-1.0 ng/ml.
Molecular Formula Recombinant hIFN-α1 does not have a Met on the amino terminus and has a calculated MW of 19,386. DTT-reduced protein migrates as an 18 kDa polypeptide and non-reduced protein migrates as a 14 kDa polypeptide due to intramolecular cystines. The expected amino-terminal CDLPE of recombinant hIFN-α1 was verified by amino acid sequencing.

Source / Purification

Recombinant human IFN-α1 (hIFN-α1) Cys24 - Asp189 (Accession # NP_076918) was produced in E. coli at Cell Signaling Technology.


Interferon-α1 is a member of the Type I IFN (1) family best known for their antiviral activity. Most nucleated cells produce one or more Type I IFNs in response to viral infection (2). Secreted Type I IFN then induces viral protective responses in neighboring non-infected cells. Type I IFNs also enhance virus-induced apoptosis (3). Other IFN-α1 activities include enhancement of dendritic cell maturation and cytotoxic T cell activity (4). IFN-α1 binds to the IFN-αR1 and IFN-αR2 heterodimer (1). Intracellular signaling through the Jak/Stat pathway is best characterized (3). However, the PI3K, ERK, and p38 kinase pathways are also involved (5). The antiviral activities of the IFNs have led to their use in treating viral infections (4). Type I IFNs also appear to have an integral role in several autoimmune diseases (6).
  1. Nagai, T. et al. (2003) J Immunol 171, 5233-43.
  2. Stetson, D.B. and Medzhitov, R. (2006) Immunity 25, 373-81.
  3. Vilcek, J. (2006) Immunity 25, 343-8.
  4. Luft, T. et al. (2002) Int Immunol 14, 367-80.
  5. van Boxel-Dezaire, A.H. et al. (2006) Immunity 25, 361-72.
  6. Banchereau, J. and Pascual, V. (2006) Immunity 25, 383-92.

Pathways & Proteins

Explore pathways + proteins related to this product.

Limited Uses

Except as otherwise expressly agreed in a writing signed by a legally authorized representative of CST, the following terms apply to Products provided by CST, its affiliates or its distributors. Any Customer's terms and conditions that are in addition to, or different from, those contained herein, unless separately accepted in writing by a legally authorized representative of CST, are rejected and are of no force or effect.

Products are labeled with For Research Use Only or a similar labeling statement and have not been approved, cleared, or licensed by the FDA or other regulatory foreign or domestic entity, for any purpose. Customer shall not use any Product for any diagnostic or therapeutic purpose, or otherwise in any manner that conflicts with its labeling statement. Products sold or licensed by CST are provided for Customer as the end-user and solely for research and development uses. Any use of Product for diagnostic, prophylactic or therapeutic purposes, or any purchase of Product for resale (alone or as a component) or other commercial purpose, requires a separate license from CST. Customer shall (a) not sell, license, loan, donate or otherwise transfer or make available any Product to any third party, whether alone or in combination with other materials, or use the Products to manufacture any commercial products, (b) not copy, modify, reverse engineer, decompile, disassemble or otherwise attempt to discover the underlying structure or technology of the Products, or use the Products for the purpose of developing any products or services that would compete with CST products or services, (c) not alter or remove from the Products any trademarks, trade names, logos, patent or copyright notices or markings, (d) use the Products solely in accordance with CST Product Terms of Sale and any applicable documentation, and (e) comply with any license, terms of service or similar agreement with respect to any third party products or services used by Customer in connection with the Products.

For Research Use Only. Not For Use In Diagnostic Procedures.
Cell Signaling Technology is a trademark of Cell Signaling Technology, Inc.
Inquiry Info.# 8927
Powered by GlobalLink OneLink SoftwarePowered By OneLink