Human IRF3 Antibody

Catalog #: MAB4019 Datasheet

Catalog #	Availability	Size / Price	Qty
MAB4019
MAB4019-SP

Detection of Human IRF3 by Western Blot.

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Human IRF3 Antibody Summary

Species Reactivity

Human

Specificity

Detects human IRF3 in Western blots.

Source

Monoclonal Mouse IgG_2B Clone # 482205

Purification

Protein A or G purified from hybridoma culture supernatant

Immunogen

E. coli-derived recombinant human IRF3
aa 206-427
Accession # Q14653

Formulation

Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied either lyophilized or as a 0.2 µm filtered solution in PBS.

Label

Unconjugated

Applications

Recommended Concentration

Sample

Western Blot

1 µg/mL

See below

CyTOF-ready

Ready to be labeled using established conjugation methods. No BSA or other carrier proteins that could interfere with conjugation.

Intracellular Staining by Flow Cytometry

0.25 µg/10⁶ cells

See below

Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.

Scientific Data

Western Blot

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Detection of Human IRF3 by Western Blot. Western blot shows lysates of Raji human Burkitt's lymphoma cell line, Daudi human Burkitt's lymphoma cell line, and Jurkat human acute T cell leukemia cell line. PVDF Membrane was probed with 1 µg/mL of Mouse Anti-Human IRF3 Monoclonal Antibody (Catalog # MAB4019) followed by HRP-conjugated Anti-Mouse IgG Secondary Antibody (Catalog # HAF007). A specific band was detected for IRF3 at approximately 60 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.

Intracellular Staining by Flow Cytometry

Detection of IRF3 antibody in Daudi Human Cell Line antibody by Flow Cytometry.

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Detection of IRF3 in Daudi Human Cell Line by Flow Cytometry. Daudi human Burkitt's lymphoma cell line was stained with Mouse Anti-Human IRF3 Monoclonal Antibody (Catalog # MAB4019, filled histogram) or isotype control antibody (Catalog # MAB0041, open histogram), followed by Phycoerythrin-conjugated Anti-Mouse IgG Secondary Antibody (Catalog # F0102B). To facilitate intracellular staining, cells were fixed with Flow Cytometry Fixation Buffer (Catalog # FC004) and permeabilized with Flow Cytometry Permeabilization/Wash Buffer I (Catalog # FC005).View our protocol for Staining Intracellular Molecules.

Preparation and Storage

Reconstitution

Reconstitute at 0.5 mg/mL in sterile PBS.

Shipping

Lyophilized product is shipped at ambient temperature. Liquid small pack size (-SP) is shipped with polar packs. Upon receipt, store 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.
6 months, -20 to -70 °C under sterile conditions after reconstitution.

Background: IRF3

IRF3 (interferon response factor 3) is a 60 kDa member of the IRF family of proteins. Human IRF3 contains one DNA binding domain (aa 7‑107), a nuclear export signal (aa 139‑149) and multiple phosphorylation sites (aa 395‑407). Viral infection stimulates IRF3 phosphorylation, nuclear translocation and stimulation of IFN production. Alternate splice forms may exist. One will show a deletion of aa 201‑327, a second will show the same deletion plus an alternate start site at Met147, and a third will show a 125 aa substitution for the C-terminal 100 aa (aa 328‑427). Over aa 206‑427, human IRF3 is 76% and 83% aa identical to mouse and pig IRF3, respectively.

Long Name

Interferon Regulatory Factor 3

Entrez Gene IDs

3661 (Human); 54131 (Mouse)

Alternate Names

interferon regulatory factor 3; IRF3; IRF-3