Recombinant Mouse IFN-beta Protein

S.A approximately 1.2x10^9 IU/mg compared to WHO standard.
  
  • Purity
    >95%, by SDS-PAGE with silver staining.
  • Endotoxin Level
    <0.10 EU per 1 μg of the protein by the LAL method.
  • Activity
    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 1-6 pg/mL.

    The specific activity of recombinant Mouse IFN‑ beta is approximately 1.2 x 109 IU/mg, which is calibrated against Murine IFN‑ beta WHO International Standard. The Murine IFN‑ beta WHO International Standard (NR-3079) was obtained through the NIH Biodefense and Emerging Infections Research Resources Repository, NIAID, NIH.
  • Source
    Human embryonic kidney cell, HEK293-derived Ile22-Asn182
  • Accession #
  • N-terminal Sequence
    Analysis
    Ile22
  • Structure / Form
    Monomer
  • Predicted Molecular Mass
    20 kDa
  • SDS-PAGE
    30-38 kDa, reducing conditions
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.
8234-MB
 
8234-MB/CF
Formulation Lyophilized from a 0.2 μm filtered solution in PBS and Tween® 80 with BSA as a carrier protein.
Formulation Lyophilized from a 0.2 μm filtered solution in PBS and Tween® 80.
Reconstitution Reconstitute at 100 μg/mL in sterile PBS containing at least 0.1% human or bovine serum albumin.
Reconstitution Reconstitute at 100 μg/mL in sterile PBS.
Shipping The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
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.
  • 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.
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.
Data Images
Recombinant Mouse IFN-beta (Catalog # 8234-MB) suppresses viral activity using L‑929 mouse fibroblast cells infected with encephalomyocarditis (EMC) virus.The ED50 for this effect is 1-6 pg/mL.
1 μg/lane of Recombinant Mouse IFN-beta (Catalog # 8234-MB) wasresolved with SDS-PAGE under reducing (R) and non-reducing (NR) conditions andvisualized by silver staining, showing bands at 32.7 and 32.9kDa, respectively.
Background: IFN-beta
Interferon beta (IFN-beta ), also known as fibroblast IFN, is a secreted, approximately 22 kDa member of the type I interferon family of molecules (1). Mature mouse IFN-beta shares 75% and 47% amino acid sequence identity with the rat and human proteins, respectively. Fibroblasts are the major producers of IFN-beta, but it can also be produced by dendritic cells, macrophages, and endothelial cells in response to pathogens (2). It is transcriptionally regulated by TRAF3, IRF3, IRF7, and NF-kappa B (3, 4). IFN-beta -deficient mice show increased susceptibility to experimental autoimmune encephalomyelitis (EAE), a disease model of human multiple sclerosis (MS) (5). Furthermore, IFN-beta has been shown to suppress the Th17 cell response in both MS and EAE and has commonly been used as a treatment for MS (6-10). IFN-beta can additionally induce the expression of the anti-inflammatory cytokine IL-10 (11).
  • References:
    1. González-Navajas, J.M. et al. (2012) Nat. Rev. Immunol. 12:125.
    2. Reder, A.T. and X. Feng (2013) Front. Immunol. 4:281.
    3. Schafer, S.L. et al. (1998) J. Biol. Chem. 273:2714.
    4. Häcker, H. et al. (2006) Nature 439:204.
    5. Teige, I. et al. (2003) J. Immunol. 170:4776.
    6. Shinohara, M.L. et al. (2008) Immunity 29:68.
    7. Guo, B. et al. (2008) J. Clin. Invest. 118:1680.
    8. Ramgolam, V.S. and S. Markovic-Plese (2010) Endocr. Metab. Immune Disord. Drug Targets 10:161.
    9. Martín-Saavedra, F.M. et al. (2008) Mol. Immunol. 45:4008.
    10. Inoue, M. and M.L. Shinohara (2013) Immunology 139:11.
    11. Wang, H. et al. (2011) J. Immunol 186:675.
  • Long Name:
    Interferon beta
  • Entrez Gene IDs:
    3456 (Human); 15977 (Mouse); 24481 (Rat)
  • Alternate Names:
    Fibroblast interferon; IFBIFNB; IFF; IFNB1; IFNbeta; IFN-beta; interferon beta; interferon, beta 1, fibroblast; MGC96956
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