• Product nameAnti-IKB alpha (phospho Y42) antibody
    See all IKB alpha primary antibodies
  • Description
    Rabbit polyclonal to IKB alpha (phospho Y42)
  • SpecificityThere may be some homology to unrelated proteins with a conserved tyrosine phosphorylation motif. It is recommended that this antibody be used after immunoprecipitation with an IKB alpha specific antibody.
  • Tested applicationsSuitable for: WB, IP, ELISAmore details
  • Species reactivity
    Reacts with: Mouse, Human
  • Immunogen

    Synthetic peptide corresponding to amino acid residues around tyrosine 42 of human IKB alpha, conjugated to KLH

  • Positive control
    • Pervanadate treated A431 and Jurkat cells.
  • General notesWe do not have concentration information for this antibody. It is optimized to work at the dilutions stated on the datasheet.

    Useful in detection of phosphorylated IKB alpha (Tyr-42).



Our Abpromise guarantee covers the use of ab24783 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
WB 1/1000. Detects a band of approximately 38 kDa (predicted molecular weight: 36 kDa).
IP Use at an assay dependent dilution.
Use 5 - 10 µl.
ELISA 1/2000.


  • FunctionInhibits 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.
  • Involvement in diseaseEctodermal dysplasia, anhidrotic, with T-cell immunodeficiency autosomal dominant
  • Sequence similaritiesBelongs to the NF-kappa-B inhibitor family.
    Contains 5 ANK repeats.
  • Post-translational
    Phosphorylated; disables inhibition of NF-kappa-B DNA-binding activity. Phosphorylation at positions 32 and 36 is prerequisite to recognition by UBE2D3 leading to polyubiquitination and subsequent degradation.
    Sumoylated; sumoylation requires the presence of the nuclear import signal. Sumoylation blocks ubiquitination and proteasome-mediated degradation of the protein thereby increasing the protein stability.
    Monoubiquitinated at Lys-21 and/or Lys-22 by UBE2D3. Ubiquitin chain elongation is then performed by CDC34 in cooperation with the SCF(FBXW11) E3 ligase complex, building ubiquitin chains from the UBE2D3-primed NFKBIA-linked ubiquitin. The resulting polyubiquitination leads to protein degradation. Also ubiquitinated by SCF(BTRC) following stimulus-dependent phosphorylation at Ser-32 and Ser-36.
    Deubiquitinated by porcine reproductive and respiratory syndrome virus Nsp2 protein, which thereby interferes with NFKBIA degradation and impairs subsequent NF-kappa-B activation.
  • Cellular localizationCytoplasm. Nucleus. Shuttles between the nucleus and the cytoplasm by a nuclear localization signal (NLS) and a CRM1-dependent nuclear export.
  • Information by UniProt
  • Database links
  • Alternative names
    • I kappa B alpha antibody
    • I-kappa-B-alpha antibody
    • IkappaBalpha antibody
    • IkB-alpha antibody
    • IKBA antibody
    • IKBA_HUMAN antibody
    • IKBalpha antibody
    • MAD 3 antibody
    • MAD3 antibody
    • Major histocompatibility complex enhancer-binding protein MAD3 antibody
    • NF kappa B inhibitor alpha antibody
    • NF-kappa-B inhibitor alpha antibody
    • NFKBI antibody
    • NFKBIA antibody
    • Nuclear factor of kappa light chain gene enhancer in B cells antibody
    • Nuclear factor of kappa light polypeptide gene enhancer in B cells inhibitor alpha antibody
    see all

Anti-IKB alpha (phospho Y42) antibody images

  • Predicted band size : 36 kDa

References for Anti-IKB alpha (phospho Y42) antibody (ab24783)

This product has been referenced in:
  • Culver C  et al. Mechanism of hypoxia-induced NF-kappaB. Mol Cell Biol 30:4901-21 (2010). WB ; Human . Read more (PubMed: 20696840) »
  • Silva G  et al. Oxidized hemoglobin is an endogenous proinflammatory agonist that targets vascular endothelial cells. J Biol Chem 284:29582-95 (2009). WB ; Human . Read more (PubMed: 19700768) »

See all 3 Publications for this product

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