• FormLiquid
  • Storage instructionsShipped at 4°C. Store at +4°C short term (1-2 weeks). Upon delivery aliquot. Store at -20°C or -80°C. Avoid freeze / thaw cycle.
  • Storage bufferPBS with 0.1% sodium azide, pH 7.4
  • Concentration information loading...
  • PurityIgG fraction
  • ClonalityMonoclonal
  • Clone number9D3
  • MyelomaNS0/1
  • IsotypeIgG1
  • Research areas


Our Abpromise guarantee covers the use of ab9386 in the following tested applications.

The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

Application Abreviews Notes
Sandwich ELISA Use at an assay dependent concentration.

This antibody can be used in a sandwich ELISA for the determination of human IFN-a2b. It recognizes different epitopes than Anti-Interferon alpha 2b antibody [4E10] (HRP) (ab5258). We recommend using this antibody as a capture antibody and ab5258 as a detection antibody.

Inhibition Assay 1/400 - 1/1000.
WB 1/1000 - 1/5000. At 5 µg/ml, this ab inhibits 90% of IFN-a2b antiviral activity in vitro: The bioassay was performed using L41 cell line and mouse encephalomyocarditis virus (EMCV). Interferon was pre-incubated with the ab for 2 h at RT and then added to the cell monolayer. 24h later the cells were infected with EMCV and cultured for further 24h. Antiviral activity of IFN was evaluated using crystal-violet staining. PAbs to respective interferons and an irrelevant MAb of same isotype were used as controls.
Indirect ELISA 1/1000 - 1/10000.


  • FunctionProduced by macrophages, IFN-alpha have antiviral activities.
  • Sequence similaritiesBelongs to the alpha/beta interferon family.
  • Cellular localizationSecreted.
  • Information by UniProt
  • Database links
  • Alternative names
    • Alpha 2a interferon antibody
    • IFN alpha 2b antibody
    • IFN-alpha-2 antibody
    • IFNA antibody
    • Ifna2 antibody
    • IFNA2_HUMAN antibody
    • INFA2 antibody
    • Interferon alpha 2 antibody
    • Interferon alpha A antibody
    • Interferon alpha-2 antibody
    • Interferon alpha-A antibody
    • LeIF A antibody
    • LeIFA antibody
    see all

Anti-Interferon alpha 2b antibody [9D3] images

  • Standard curve for the determination of human interferon-alpha 2b by two-epitope ELISA: capture antibody 9D3 (ab9386), peroxidase-labeled antibody 4E10 (ab9388).

  • Immunoblot of human interferon-alpha 2b using monoclonal antibody 9D3. Antibody 9D3 at a dilution of 1:1000 (2.5 µg/ml).
  • Neutralizing activity of monoclonal antibody 9D3 in vitro. Interferon antiviral bioassay: L41 cells, mouse encephalomyacarditis virus (EMCV). Antibodies at 5µg/ml. Control 1 - without EMCV (non-infected cells), control 2 - without interferon, control 3 - irrelevant antibody.

References for Anti-Interferon alpha 2b antibody [9D3] (ab9386)

This product has been referenced in:
  • Zhang Q  et al. Improvement of human interferon alpha secretion by Lactococcus lactis. Biotechnol Lett 32:1271-7 (2010). WB . Read more (PubMed: 20431909) »
  • Kisand K  et al. Interferon autoantibodies associated with AIRE-deficiency decrease the expression of IFN-stimulated genes. Blood : (2008). Read more (PubMed: 18606876) »

See all 3 Publications for this product

Product Wall

Thank you for contacting us. Concentrations of the antibodies ab9386 and ab9388 are determined spectrophotometrically by an adsorbance measurement at 280 nm. The absorbance value (A280) is divided by the extiction coefficient of mouse IgG - 1.35. I hop...

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Thank you for contacting Abcam. For both ab9386 and ab9388, we currently sell them in 100ul aliquots, at a concentration of 2mg/ml. From what I can see, there are no plans to change this concentration for future lots of the antibody and since it is a m...

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Thank you for your inquiry. Neutralizing activity of ab9386 has been tested in cell line-based bioassay where IFN has been applied in a concentration range between 4 IU/ml and 0.125 IU/ml. If you use lower concentrations of IFN (below 0.125 IU/ml...

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I'm sorry to hear you are having a problem with ab9386. The use of monoclonal antibodies in sandwich ELISA always requires a careful selection of a suitable pair of antibodies. Antibodies should be complementary, e.g. they should recognize different...

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To use monoclonal antibodies 9D3 and 4E10 in sandwich ELISA for the detection of huIFN-alpha-2b, 4E10 antibody should be labeled either with horse-radish peroxidase or biotin. Monoclonal antibody 9D3 should be used as a capture antibody (for plate coat...

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Usually, each monoclonal antibody recognises only a single epitope on the antigen because each hybridoma clone is derived from a single B-cell. This antibody reacts well with both native and SDS-denaturated IFN-alpha 2b. Therefore, we suppose that the...

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