Recombinant Mouse IFN-alpha 4 Protein, CF

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Recombinant Mouse IFN-alpha 4 Protein Bioactivity
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Product Details
Citations (1)
Reviews (1)

Recombinant Mouse IFN-alpha 4 Protein, CF Summary

Product Specifications

>95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
Endotoxin Level
<0.10 EU per 1 μg of the protein by the LAL method.
Measured in an anti-viral assay using L‑929 mouse fibroblast cells infected with encephalomyocarditis (EMC) virus. Vogel, S.N. et al. (1982) Infect. Immunol. 38:681. The ED50 for this effect is <60 pg/mL.
Human embryonic kidney cell, HEK293-derived mouse IFN-alpha 4 protein
Accession #
N-terminal Sequence
Predicted Molecular Mass
19 kDa
17-25 kDa, under reducing conditions

Product Datasheets

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Carrier Free

What does CF mean?

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.

What formulation is right for me?

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 with polar packs. Upon receipt, store it immediately at the temperature recommended below.
Stability & 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.

Scientific Data

Bioactivity Recombinant Mouse IFN-alpha 4 Protein Bioactivity View Larger

Recombinant Mouse IFN-alpha/IFNA4 (Catalog # 10259-IF) suppresses viral activity on L-929 mouse fibroblast cells infected with encephalomyocarditis (EMC) virus. The ED50 for this effect is <60 pg/mL.

SDS-PAGE Recombinant Mouse IFN-alpha 4 Protein SDS-PAGE View Larger

2 μg/lane of Recombinant Mouse IFN-alpha 4 (Catalog # 10259-IF) was resolved with SDS-PAGE under reducing (R) and non-reducing (NR) conditions and visualized by Coomassie® Blue staining, showing bands at 17-25 kDa.

Reconstitution Calculator

Reconstitution Calculator

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.


Background: IFN-alpha 4

The interferons (IFN) are a family of cytokines with potent antiviral, antiproliferative and immunomodulatory properties, and are classified based on their binding specificity to cell surface receptors (1). The type I IFNs bind to the interferon alpha receptor (IFNAR), which consists of two subunits: IFNAR1 ( alpha -subunit) and IFNAR2 ( beta -subunit). This binding contributes to TNF-alpha induced signaling (2, 3). Both the human and mouse genome code for more than a dozen closely related IFN-alpha subtypes and the various IFN-alphas share about 80% sequence homology among them (4, 5). The mouse IFN-alpha 4 consists of 186 amino acids (aa) including a 24 aa signal peptide and a 162 aa IFN-alpha 4 mature domain. The mature mouse IFN-alpha 4 shares 58% and 76% sequence identity with mature human and rat IFN-alpha 4, respectively. The mouse IFN-alpha 4 reduces the local replication of murine cytomegalovirus in the tibia muscle (6). mIFN-A4 is a strong activator of Mx gene and  was shown to be very effective in reducing splenomegaly (7).

  1. Pestka S, et al. (1987) Annu Rev Biochem. 56:727.
  2. Fung, K.Y. et al. (2013) Science 339:1088.
  3. Matsumiya, T. et al. (2007) J. Immunol. 179:4542.
  4. Schreiber, G. and J. Piehler (2015) Trends Immunol. 36:139.
  5. van Pesch, V. et al. (2004) J. Virol. 78:8219.
  6. Yeow, W.S. et al. (1998) J. Immunol. 15:2932.
  7. Gerlach, N. et al. (2009) European J. Immunol. 39:136.
Long Name
Interferon alpha 4
Entrez Gene IDs
3441 (Human); 15967 (Mouse)
Alternate Names
IFNA4; IFNalpha 4; IFN-alpha 4; IFN-alpha-4; IFN-alpha4a; INFA4; interferon alpha-4; Interferon alpha-4B; Interferon alpha-76; Interferon alpha-M1; interferon, alpha 4; MGC142200

Citation for Recombinant Mouse IFN-alpha 4 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

  1. Cancer cell-derived type I interferons instruct tumor monocyte polarization
    Authors: D Kwart, J He, S Srivatsan, C Lett, J Golubov, EM Oswald, P Poon, X Ye, J Waite, AG Zaretsky, S Haxhinasto, E Au-Yeung, NT Gupta, J Chiu, C Adler, S Cherravuru, E Malahias, N Negron, K Lanza, A Coppola, M Ni, H Song, Y Wei, GS Atwal, L Macdonald, NS Oristian, W Poueymirou, V Jankovic, M Fury, I Lowy, AJ Murphy, MA Sleeman, B Wang, D Skokos
    Cell Reports, 2022-12-06;41(10):111769.
    Species: Mouse
    Sample Types: Whole Cells
    Applications: Bioassay


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Recombinant Mouse IFN-alpha 4 Protein, CF
By Anonymous on 11/16/2020
Application: Cell Adhesion