Anti-IkB beta (phospho S23) antibody (ab51142)


  • Product nameAnti-IkB beta (phospho S23) antibody
    See all IKB beta primary antibodies
  • Description
    Rabbit polyclonal to IkB beta (phospho S23)
  • SpecificityDetects endogenous levels of IkB-ß only when phosphorylated at serine 23.
  • Tested applicationsSuitable for: ICC/IF, WB, ELISAmore details
  • Species reactivity
    Reacts with: Human
  • Immunogen

    Synthetic phosphopeptide derived from human IkB-ß around the phosphorylation site of serine 23 (L-G-SP-L-G).

  • Positive control
    • Extracts from Hela cells treated with TNF-a.



Our Abpromise guarantee covers the use of ab51142 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
ICC/IF Use a concentration of 1 - 5 µg/ml.
WB 1/300 - 1/1000. Detects a band of approximately 38 kDa (predicted molecular weight: 38 kDa).
ELISA 1/20000.


  • FunctionInhibits NF-kappa-B by complexing with and trapping it in the cytoplasm. However, the unphosphorylated form resynthesized after cell stimulation is able to bind NF-kappa-B allowing its transport to the nucleus and protecting it to further NFKBIA-dependent inactivation. Association with inhibitor kappa B-interacting NKIRAS1 and NKIRAS2 prevent its phosphorylation rendering it more resistant to degradation, explaining its slower degradation.
  • Tissue specificityExpressed in all tissues examined.
  • Sequence similaritiesBelongs to the NF-kappa-B inhibitor family.
    Contains 6 ANK repeats.
  • Post-translational
    Phosphorylated by RPS6KA1; followed by degradation. Interaction with NKIRAS1 and NKIRAS2 probably prevents phosphorylation.
  • Cellular localizationCytoplasm. Nucleus.
  • Information by UniProt
  • Database links
  • Alternative names
    • I kappa B beta antibody
    • I-kappa-B-beta antibody
    • IkappaBbeta antibody
    • IKB beta antibody
    • IkB-B antibody
    • IkB-beta antibody
    • IKBB antibody
    • IKBB_HUMAN antibody
    • IkBbeta antibody
    • NF kappa BIB antibody
    • NF-kappa-B inhibitor beta antibody
    • NF-kappa-BIB antibody
    • Nfkbib antibody
    • Thyroid receptor interacting protein 9 antibody
    • Thyroid receptor-interacting protein 9 antibody
    • TR interacting protein 9 antibody
    • TR-interacting protein 9 antibody
    • TRIP-9 antibody
    • TRIP9 antibody
    see all

Anti-IkB beta (phospho S23) antibody images

  • All lanes : Anti-IkB beta (phospho S23) antibody (ab51142) at 1/300 dilution

    Lane 1 : extracts from Hela cells treated with TNF-a with immunizing peptide
    Lane 2 : extracts from Hela cells treated with TNF-a

    Lysates/proteins at 0.02 µg/ml per lane.

    Predicted band size : 38 kDa
    Observed band size : 38 kDa
  • ICC/IF image of ab51142 stained HeLa cells. The cells were 4% PFA fixed (10 min) and then incubated in 1%BSA / 10% normal goat serum / 0.3M glycine in 0.1% PBS-Tween for 1h to permeabilise the cells and block non-specific protein-protein interactions. The cells were then incubated with the antibody (ab51142, 1µg/ml) overnight at +4°C. The secondary antibody (green) was Alexa Fluor® 488 goat anti-rabbit IgG (H+L) used at a 1/1000 dilution for 1h. Alexa Fluor® 594 WGA was used to label plasma membranes (red) at a 1/200 dilution for 1h. DAPI was used to stain the cell nuclei (blue) at a concentration of 1.43µM.

References for Anti-IkB beta (phospho S23) antibody (ab51142)

ab51142 has not yet been referenced specifically in any publications.

Product Wall

Abcam guarantees this product to work in the species/application used in this Abreview.
Application Western blot
Sample Human Cell lysate - whole cell (huh-7)
Loading amount 10000 cells
Specification huh-7
Gel Running Conditions Reduced Denaturing (12%)
Blocking step Milk as blocking agent for 24 hour(s) and 0 minute(s) · Concentration: 5% · Temperature: 4°C

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Submitted Jul 14 2008