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REACTIVITY SENSITIVITY MW (kDa) Isotype
39 Mouse 

Product Usage Information

Storage: Supplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 µg/ml BSA, 50% glycerol. Store at –20°C. Do not aliquot the antibodies.

Specificity / Sensitivity

IκBα (L35A5) Mouse mAb (Amino-terminal Antigen) detects endogenous levels of total IκBα protein.


Source / Purification

Monoclonal antibody is produced by immunizing animals with a GST-IκBα fusion protein corresponding the amino-terminus of human IκBα.

Product Description

This Cell Signalinling Technology antibody is immobilized via covalent binding of primary amino groups to N-hydroxysuccinimide (NHS)-activated Sepharose® beads. IκBα (L35A5) Mouse mAb (Amino-terminal Antigen) (Sepharose® Bead Conjugate) is useful for the immunoprecipitation of IκBα protein.


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.


Entrez-Gene Id 4792
Swiss-Prot Acc. P25963


For Research Use Only. Not For Use In Diagnostic Procedures.
Cell Signaling Technology® is a trademark of Cell Signaling Technology, Inc.