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IRF3 Polyclonal antibody

IRF3 Polyclonal Antibody for FC, IF, IHC, IP, WB, ELISA

Host / Isotype

Rabbit / IgG


human and More (4)





Cat no : 11312-1-AP


interferon regulatory factor 3, IRF 3, IRF3

Tested Applications

Positive WB detected inHEK-293T cells, HCT 116 cells, HeLa cells, U-937 cells, human brain tissue, Jurkat cells, MCF-7 cells, MDA-MB-231 cells
Positive IP detected inJurkat cells
Positive IHC detected inhuman spleen tissue
Note: suggested antigen retrieval with TE buffer pH 9.0; (*) Alternatively, antigen retrieval may be performed with citrate buffer pH 6.0
Positive IF detected inHepG2 cells
Positive FC detected inHepG2 cells

Recommended dilution

Western Blot (WB)WB : 1:5000-1:50000
Immunoprecipitation (IP)IP : 0.5-4.0 ug for 1.0-3.0 mg of total protein lysate
Immunohistochemistry (IHC)IHC : 1:50-1:200
Immunofluorescence (IF)IF : 1:10-1:100
Flow Cytometry (FC)FC : 0.20 ug per 10^6 cells in a 100 µl suspension
It is recommended that this reagent should be titrated in each testing system to obtain optimal results.
Sample-dependent, check data in validation data gallery

Product Information

11312-1-AP targets IRF3 in WB, RIP, IP, IHC, IF, FC, CoIP, ChIP, ELISA applications and shows reactivity with human samples.

Tested Reactivity human
Cited Reactivityhuman, rat, sheep, monkey, pig
Host / Isotype Rabbit / IgG
Class Polyclonal
Type Antibody
Immunogen IRF3 fusion protein Ag1858
Full Name interferon regulatory factor 3
Calculated molecular weight 47 kDa
Observed molecular weight 50-60 kDa
GenBank accession numberBC009395
Gene symbol IRF3
Gene ID (NCBI) 3661
Conjugate Unconjugated
Form Liquid
Purification Method Antigen affinity purification
Storage Buffer PBS with 0.02% sodium azide and 50% glycerol pH 7.3.
Storage ConditionsStore at -20°C. Stable for one year after shipment. Aliquoting is unnecessary for -20oC storage. 20ul sizes contain 0.1% BSA.

Background Information

The virul-induced expression of interferon(IFN) genes in infected cells implicate in the interplay of several constitutively expressed and virus-activated transcription factors. A family of IFN regulatory factors(IRFs) have been shown to has a role in the transcription of IFN genes as well as IFN-stimulated genes. IRF3 is a novel key transcriptional regulator of type I IFN-dependent immune responses and involves in the innate immune response against DNA and RNA viruses, by binding to the promoters of IFN. It located in the cytoplasm of uninfected cells in an inactive form, and following viral infection, double-stranded RNA (dsRNA), or toll-like receptor (TLR) signaling, could be phosphorylated by IKBKE and TBK1 kinases. This induces a conformational change, leading to its dimerization, nuclear localization and association with CREB binding protein (CREBBP) to form dsRNA-activated factor 1 (DRAF1), a complex which activates the transcription of the type I IFN and ISG genes. IRF3 exists some isoforms with MV 47-49 kDa, 33 kDa and 12-16 kDa.


Product Specific Protocols
WB protocol for IRF3 antibody 11312-1-APDownload protocol
IHC protocol for IRF3 antibody 11312-1-APDownload protocol
IF protocol for IRF3 antibody 11312-1-APDownload protocol
IP protocol for IRF3 antibody 11312-1-APDownload protocol
Standard Protocols
Click here to view our Standard Protocols




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Allosteric inhibition reveals SHP2-mediated tumor immunosuppression in colon cancer by single-cell transcriptomics.

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NSUN2-mediated M5c methylation of IRF3 mRNA negatively regulates type I interferon responses during various viral infections

Authors - Hongyun Wang


The reviews below have been submitted by verified Proteintech customers who received an incentive forproviding their feedback.


Sarah (Verified Customer) (12-18-2019)

This antibody is awesome- been searching for an Pab IRF 3 antibody that works well in a species other than human, and we finally found this one! Thank you!

  • Applications: Western Blot,