This product is equivalent to the Thermo Scientific™ Pierce™ Human IFN alpha ELISA Kit (Multi-Subtype)

IFN alpha (Multisubtype) Human ELISA Kit

Catalog number: KHC4032

Invitrogen™  Related applications: Protein Assays and Analysis

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The Human Interferon-α (IFN-α) Multi-Subtype ELISA research-use-only kit is to be used for the quantitative determination of human IFN-α in cell culture supernatant samples using 96-well plates and a microplate reader. The kit is specifically formulated to detect 14 out of 15 identified human IFN-α subtypes: IFN-αA, IFN-α2, IFN-αD, IFN-αB2, IFN-αC, IFN-αG, IFN-αH, IFN-αI, IFN-αJ1, IFN-αK, IFN-α1, IFN-α4a, IFN-α4b, and IFN-αWA. The assay is based on the international reference standard for human IFN-α provided by the National Institutes of Health* and recognizes both natural and recombinant forms of human IFN-α.

Performance characteristics
• Sensitivity: <12.5 pg/mL
• Standard curve range: 12.5–500 pg/mL
• Sample types: cell culture supernatants
• Species cross-reactivity: human
• Sample volume: 100 μL
• Total assay incubation time: 3.25 hrs

Principle of the method
The Human IFN-α Multi-Subtype kit is a solid phase sandwich enzyme-linked immunosorbent assay (ELISA). A monoclonal antibody specific for human IFN-α has been coated onto the wells of the microtiter strips provided. Samples, including standards of known human IFN-α content, control specimens, and unknowns, are pipetted into these wells. During the first incubation, the human IFN-α antigen binds to the immobilized (capture) antibody on one site. After washing, a detection antibody specific for human IFN-α is added. During the second incubation, this antibody binds to the immobilized human IFN-α captured during the first incubation.

After removal of excess second antibody, an anti-secondary antibody conjugate (horseradish peroxidase) is added. This binds to the detection antibody to complete the four-member sandwich. After a second incubation and washing to remove all the unbound conjugate, a substrate solution is added, which is acted upon by the bound enzyme to produce color. The intensity of this colored product is directly proportional to the concentration of human IFN-α present in the original specimen.

Background information
Interferons (IFNs) are a family of mammalian cytokines initially characterized by their ability to inhibit viral infection. They are synthesized and secreted by most cell types in response to pathogens. In addition to their antiviral properties, IFNs have also been shown to exhibit anti-proliferative, immunomodulatory, and many other activities.

In humans, IFN-α consists of a group of proteins that are greater than 85% homologous by amino acid sequence. Numerous individual human IFN-α subtypes have been identified; many with different properties. It remains unclear why there are multiple IFN-α subtypes. A variety of studies suggested they possess overlapping but also unique sets of biological activities.

Each Human IFN-α Multi-Subtype ELISA kit is validated for sensitivity, specificity, precision, and lot-to-lot consistency. See product insert for more information on validation.

Related links
Learn more about ELISA kits
Learn more about other immunoassays

*Please refer to the ELISA protocol for specific reference citations.
For Research Use Only. Not for use in diagnostic procedures.


Assay Incubation Time: 3.25 hr
Assay Range: 12.5-500 pg/mL
Assay Sensitivity: <12.5 pg/mL
Detection Method: Colorimetric
For Use With (Equipment): Microplate Reader
Former Identifiers: Novex
Gene Aliases: IFL, IFN, IFN-ALPHA, IFN-alphaD3, IFNA@, IFNA1, IFN-alphaA, IFNAB, INFA2, IFNA2
Gene ID: 3439, 3440
Gene Name: interferon alpha 1, interferon alpha 2
Gene Symbol: IFNA1, IFNA2
Immunoassay Kit Format: Coated ELISA Kit
Label or Dye: HRP (Horseradish Peroxidase)
Product Size: 96 tests
Protein Aliases: IFN-alpha-1/13, Interferon alpha-D, LeIF D, IFN-alpha-2, Interferon alpha-A, LeIF A
Protein Name: Interferon alpha-1/13, Interferon alpha-2
Sample Type (Specific): Cell Culture Supernatants
Sample Volume: 100 µL
Shipping Condition: Wet Ice
Target (Kit Named): IFN alpha
Target Species (Named): Human
Target Species (Validated): Human
Target Sub-Specificity: Multisubtype
UniProt ID: P01562, P01563

Contents & storage

Pre-coated plate(s), standard or calibrator, detector antibody, HRP conjugate, diluents, wash buffer, substrate(s), and stop solution. Store kit at 2-8°C. See product manual for detailed contents and storage conditions for maximum stability.


Manuals & protocols

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