Cell Signaling Technology

Product Pathways - NF-kB Signaling

Phospho-IκBα (Ser32) (14D4) Rabbit mAb (Biotinylated) #5209

Applications Reactivity Sensitivity MW (kDa) Isotype
W H M R Mk (Pg) Endogenous 40 Rabbit IgG

Applications Key:  W=Western Blotting
Reactivity Key:  H=Human  M=Mouse  R=Rat  Mk=Monkey  Pg=Pig
Species cross-reactivity is determined by western blot. Species enclosed in parentheses are predicted to react based on 100% sequence homology.

Protocols

Specificity / Sensitivity

Phospho-IκBα (Ser32) (14D4) Rabbit mAb (Biotinylated) detects endogenous levels of IκBα only when phosphorylated at Ser32.

Source / Purification

Monoclonal antibody is produced by immunizing animals with a synthetic phosphopeptide corresponding to residues surrounding Ser32 of human IκBα.

Western Blotting

Western Blotting

Western blot analysis of extracts from HeLa cells, untreated or treated with human TNF-α (#8902, 20 ng/ml) for 5 minutes, using Phospho-IκBα (Ser32) (14D4) Rabbit mAb (Biotinylated).

Description

This Cell Signaling Technology antibody is conjugated to biotin under optimal conditions. The biotinylated antibody is expected to exhibit the same species cross-reactivity as the unconjugated Phospho-IκBα (Ser32) (14D4) Rabbit mAb #2859.

Background

The NF-κB/Rel transcription factors are present in the cytosol in an inactive state complexed with the inhibitory IκB proteins (1-3). Activation occurs via phosphorylation of IκBα at Ser32 and Ser36 followed by proteasome-mediated degradation that results in the release and nuclear translocation of active NF-κB (3-7). IκBα phosphorylation and resulting Rel-dependent transcription are activated by a highly diverse group of extracellular signals including inflammatory cytokines, growth factors, and chemokines. Kinases that phosphorylate IκB at these activating sites have been identified (8).

  1. Baeuerle, P.A. and Baltimore, D. (1988) Science 242, 540-6.
  2. Beg, A.A. and Baldwin, A.S. (1993) Genes Dev 7, 2064-70.
  3. Finco, T.S. et al. (1994) Proc Natl Acad Sci USA 91, 11884-8.
  4. Brown, K. et al. (1995) Science 267, 1485-8.
  5. Brockman, J.A. et al. (1995) Mol Cell Biol 15, 2809-18.
  6. Traenckner, E.B. et al. (1995) EMBO J 14, 2876-83.
  7. Chen, Z.J. et al. (1996) Cell 84, 853-62.
  8. Karin, M. and Ben-Neriah, Y. (2000) Annu Rev Immunol 18, 621-63.

Application References

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Companion Products

For Research Use Only. Not For Use In Diagnostic Procedures.

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