Recombinant NFκB p50 protein

Aliases: p50, KBF1, p105, EBP-1, NF-kB1, NFKB-p50, NFkappaB, NF-kappaB, NFKB-p105, NF-kappa-B
Catalog No: 31101 Format: 5 µg $430 Buy
Catalog No: 31301 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 p50, 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. 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 p50 is suitable for both gelshift and TransAM® assays. The standard curve for TransAM® NFκB p50 was generated using the range of 10 - 0.156 ng of protein. This protein is not recommended for Western blotting. NOTE: The presence of Poly [d(I-C)] in buffers may affect protein functionality and should be avoided.

Protein Details

Full length recombinant NFκB p50 protein was expressed in E. coli (accession number (P19838). Protein was purified by affinity chromatography, followed by gel filtration. The protein contains a His-Tag.


This product was used in the following publications:
Genome Biol. 2014;15(10):494.
Cells. 2018 Oct 22;7(10). pii: E177. doi: 10.3390/cells7100177.


TransAM® standard curve generated using Recombinant NFκB p50 protein.
The standard curve for TransAM® was generated using a range of 10 - 0.156 ng of protein and run on the TransAM® NFκB p50 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.