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IkappaB-alpha Antibody

Rabbit Monoclonal Antibody

  • WB - IkappaB-alpha Antibody AJ1389b
    A. Western blot analysis on (A) HeLa and (B) Jurkat cell lysates using anti-IkappaB-alpha RabMAb (Cat. #AJ1389b), dilution 1:1000.
  • IHC - IkappaB-alpha Antibody AJ1389b
    B.Immunohistochemical analysis of paraffin-embedded human kidneys using anti-IkappaB-alpha RabMAb (Cat. #AJ1389b).
Product Information
  • Applications Legend:
  • WB=Western Blot
  • IHC=Immunohistochemistry
  • IHC-P=Immunohistochemistry (Paraffin-embedded Sections)
  • IHC-F=Immunohistochemistry (Frozen Sections)
  • IF=Immunofluorescence
  • FC=Flow Cytopmetry
  • IC=Immunochemistry
  • ICC=Immunocytochemistry
  • IP=Immunoprecipitation
  • DB=Dot Blot
  • CHIP=Chromatin Immunoprecipitation
  • FA=Fluorescence Assay
  • IEM=Immunoelectronmicroscopy
  • EIA=Enzyme Immunoassay
Primary Accession P25963
Reactivity Human, Mouse, Rat
Host Rabbit
Clonality Monoclonal
Clone Names EP697
Calculated MW 35609 Da
Gene ID 4792
Other Names NF-kappa-B inhibitor alpha, I-kappa-B-alpha, IkB-alpha, IkappaBalpha, Major histocompatibility complex enhancer-binding protein MAD3, NFKBIA, IKBA, MAD3, NFKBI
Target/Specificity A synthetic peptide corresponding to residues on the C terminus of human IkappaB-alpha was used as an immunogen.
Dilution WB~~1:1000~10000
Format 50 mM Tris-Glycine (pH 7.4), 0.15 M NaCl, 40% Glycerol, 0.01% sodium azide and 0.05% BSA.
StorageMaintain refrigerated at 2-8°C for up to 6 months. For long term storage store at -20°C in small aliquots to prevent freeze-thaw cycles.
PrecautionsIkappaB-alpha Antibody is for research use only and not for use in diagnostic or therapeutic procedures.
Protein Information
Synonyms IKBA, MAD3, NFKBI
Function Inhibits the activity of dimeric NF-kappa-B/REL complexes by trapping REL dimers in the cytoplasm through masking of their nuclear localization signals. On cellular stimulation by immune and proinflammatory responses, becomes phosphorylated promoting ubiquitination and degradation, enabling the dimeric RELA to translocate to the nucleus and activate transcription.
Cellular Location Cytoplasm. Nucleus. Note=Shuttles between the nucleus and the cytoplasm by a nuclear localization signal (NLS) and a CRM1-dependent nuclear export.
Research Areas
Citations (0)

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The NF-kappaB/Rel transcription factors are present in the cytosol in an inactive state, complexed with the inhibitory IkappaB-alpha protein (1-4). In response to many different NF-kappaB-inducing agents including T-cell mitogens, proinflammatory cytokines, and viral transactivators the inhibitory IkappaB-alpha is rapidly phosphorylated and degraded (2). Phosphorylation of IkappaB-alpha at Ser32 and Ser36 has been shown to stimulate conjugation with ubiquitin and subsequent degradation of IkappaB-alpha (3). Phosphorylation of IkappaB-alpha at Ser32 and Ser36 is critical for activation of NF-kappaB, which then translocates to the nucleus and induces transcription of genes that protect organism (1-4).


1. Traenckner, E.B., et al. EMBO J. 14: 2876
2. Brockman, J.A., et al. Mol. Cell. Biol. 15: 2809
3. Chen, Z.J., et al. Cell 84: 853
4. Brown, K., et al. Science 267: 1485

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Cat# AJ1389b
(40 western blots)
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