The NFkB/Rel transcription factors are present in the cytosol in an inactive state, complexed with the inhibitory IkB proteins (1-3). Most agents that activate NFkB do so through a common pathway based on phosphorylation-induced, proteasome-mediated degradation of IkB (3-7). The key regulatory step in this pathway involves activation of a high molecular weight IkB kinase (IKK) complex, whose catalysis is generally carried out by three tightly associated IKK subunits. IKKa and IKKb serve as the catalytic subunits of the kinase. IKKg serves as the regulatory subunit (8,9). Activation of IKK depends on phosphorylation; Ser177 and Ser181 in the activation loop of IKKb (176 and 180 in IKKa) are the specific sites whose phosphorylation causes conformational changes resulting in kinase activation (10-13).

Suitable for use in Western Blot. Other applications not tested.

Western Blot: 1:1000 Optimal dilutions to be determined by the researcher.

For long-term storage, aliquot and store at -20°C. Aliquots are stable for at least 6 months at -20°C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.

Purified by Protein A and peptide affinity chromatography.

Supplied as a liquid in 10mM sodium HEPES, pH 7.5, 150mM sodium chloride, 0.1mg/ml BSA, 50% glycerol.

Recognizes endogenous levels of total IKKa, IKKb, IKKg and IKKe proteins, respectively. These antibodies do not cross-react with IKK subunits other than their specified target.

This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications without the expressed written authorization of United States Biological.