Recombinant c-Fos protein

Aliases: p55, AP-1, FOS
Catalog No: 31115 Format: 5 µg $485 Buy

Expressed In: Baculovirus 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.


c-Fos is one of the proteins that form the heteromeric AP-1 transcription factor complex. AP-1 proteins play a role in the expression of many genes involved in the regulation of cellular processes such as differentiation, proliferation and apoptosis. The transcription factor AP-1 is composed of a mixture of heterodimeric protein complexes derived from the Fos and Jun families, including c-Fos, FosB, Fra-1, c-Jun, JunB and JunD. c-Fos is a nuclear phosphoprotein that forms a tight but non-covalently linked complex with the Jun/AP-1 transcription factor. In the heterodimer, Fos and Jun/AP-1 basic regions each seem to interact with symmetrical DNA half sites. Upon TGF-β activation, c-Fos forms a multimeric SMAD3/SMAD4/Jun/Fos complex at the AP-1/SMAD-binding site to regulate TGF-β-mediated signaling. c-Fos has a critical function in regulating bone morphogenesis.

Application Notes

Recombinant c-Fos is suitable for DNA and protein-protein interaction assays. 100 ng is sufficient for DNA-protein and protein-protein interaction studies. The molecular weight of the protein is ~50 kDa. The standard curve for TransAM® AP-1 c-Fos was generated using the range of 40-2.5 ng of protein. NOTE: The presence of Poly [d(I-C)] in buffers may affect protein functionality and should be avoided.

Protein Details

Recombinant c-Fos was expressed from full length (accession number NM 003131) with an N-terminal His-Tag in a baculovirus system and purified by an affinity column in combination with FPLC chromatography. The purified recombinant protein is greater than 90% homogeneous and contains no detectable protease, DNase and RNase activity.


TransAM® standard curve generated using Recombinant c-Fos protein.
The standard curve for TransAM® was generated using a range of 40-10 ng of protein and run on the TransAM® AP-1 c-Fos ELISA Kit.


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.