Recombinant NFκB p65 protein

Aliases: RELA, p65, NFKB3
Catalog No: 31102 Format: 5 µg $430 Buy
Catalog No: 31302 Format: 15 µg $910 Buy

Expressed In: E. coli Protein Species: Human


A representative Technical Data Sheet (TDS) is provided here. Please refer to the lot-specific TDS you will receive with your order for the lot-specific buffer contents and protein concentration.


NFκB p65 is a subunit of the NFκB transcription factor complex that plays a significant role in the regulation of genes that control various biological processes, including inflammation, differentiation, tumorigenesis, and cell growth and survival. NFkB is comprised of homo- or heterodimers of different subunits of the structurally related Rel family of transcription factors that includes p50 (NF-kB1), p52 (NF-kB2), p65 (RelA), RelB and c-Rel. NFκB p65, RelB and c-Rel contain a transactivation domain (TD) in their C-termini, which is required for the transport of active NFkB complexes into the nucleus. In contrast, subunits p50 and p52 do not contain transactivation domains; they are unable to transactivate on their own and must form heterodimers with p65, RelB or c-Rel. The p50/p65 heterodimers and the p50 homodimers are the most common dimers found in the NFκB signaling pathway. Inactive NFkB dimers are sequestered in the cytoplasm of cells by the IκB family of inhibitory proteins. Activation of NFkB by external inducers such as lipopolysaccharide, TNF or IL-1, results in the phosphorylation and degradation of the IκB proteins. This releases NFκB dimers, which subsequently translocate to the nucleus where they activate appropriate target genes.

Application Notes

Recombinant NFκB p65 is suitable for Western blotting and TransAM® assays. 100 ng is sufficient for most protein-protein interaction studies. The standard curve for TransAM NFκB p65 was generated using the range of 40-0.625 ng of protein. NOTE: The presence of Poly [d(I-C)] in buffers may affect protein functionality and should be avoided.

For larger package sizes of Recombinant NFκB p65, please refer to Cat. No. 81086 / 81786.

Protein Details

Recombinant NFκB p65 protein was expressed from a full-length cDNA clone in E. coli and has a 14 amino acid truncation at the C-term. This clone had five point mutations compared to the p65 sequence listed under accession no. AAA36408: L159V, P180S, F309S, A439V and V462M. The protein was purified by affinity chromatography, followed by gel filtration. The protein contains a His-Tag.


This product was used in the following publications:
BMC Bioinformatics. 2011 Jul 5;12:276. doi: 10.1186/1471-2105-12-276.
Genome Biol. 2014;15(10):494.
J Biol Chem. 2016 Feb 12;291(7):3639-47. doi: 10.1074/jbc.M115.679704. Epub 2015 Dec 18.
Oncotarget. 2016 Mar 22;7(12):14871-84. doi: 10.18632/oncotarget.7652.


TransAM® standard curve generated using Recombinant NFκB p65 protein.
The standard curve for TransAM® was generated using a range of 40 - 0.625 ng of protein and run on the TransAM® NFκB p65 ELISA Kit.


Lyophilized proteins can be stored at -20°C or -80°C, preferably desiccated. Recombinant proteins in solution are temperature sensitive and must be stored at -80°C to prevent degradation. Avoid repeated freeze/thaw cycles and keep on ice when not in storage.


This product is guaranteed for 6 months from date of receipt.

This product is for research use only and is not for use in diagnostic procedures.