316254
Fos
Größe
£510.00
- SKU:
- 316254
- Reinheit:
- Purified by immunoaffinity chromatography.
- Lagerbedingungen:
- -20°C
- Hersteller:
- United States Biological
- Host:
- Rabbit
- Immunogen:
- Center-peptide of human FOS
- Format:
- Supplied as a liquid in PBS, pH 7.3, 0.02% sodium azide, 50% glycerol.
- Weitere Details:
- The Fos family of nuclear oncogenes includes c-Fos, FosB, Fos-related antigen 1 (FRA1), and Fos-related antigen 2 (FRA2) . While most Fos proteins exist as a single isoform, the FosB protein exists as two isoforms: full-length FosB and a shorter form, FosB2 (Delta FosB), that lacks the carboxy-terminal 101 aa. The expression of Fos proteins is rapidly and transiently induced by a variety of extracellular stimuli including growth factors, cytokines, neurotransmitters, polypeptide hormones, and stress. Fos proteins dimerize with Jun proteins (c-Jun, JunB, and JunD) to form Activator Protein-1 (AP-1), a transcription factor that binds to TRE/AP-1 elements and activates transcription. Fos and Jun proteins contain the leucine-zipper motif that mediates dimerization and an adjacent basic domain that binds to DNA. The various Fos/Jun heterodimers differ in their ability to transactivate AP-1 dependent genes. In addition to increased expression, phosphorylation of Fos proteins by Erk kinases in response to extracellular stimuli may further increase transcriptional activity . Phosphorylation of c-Fos at Ser32 and Thr232 by Erk5 increases protein stability and nuclear localization . Phosphorylation of FRA1 at Ser252 and Ser265 by Erk1/2 increases protein stability and leads to overexpression of FRA1 in cancer cells . Following growth factor stimulation, expression of FosB and c-Fos in quiescent fibroblasts is immediate, but very short-lived, with protein levels dissipating after several hours . FRA1 and FRA2 expression persists longer and appreciable levels can be detected in asynchronously growing cells . Deregulated expression of c-Fos, FosB, or FRA2 can result in neoplastic cellular transformation, however, Delta FosB lacks the ability to transform cells . Applications: Suitable for use in Western Blot, Immunohistochemistry. Other applications not tested. Recommended Dilution: Western Blot: 1:500-1:2000 Immunohistochemistry: 1:50-1:200 Optimal dilutions to be determined by the researcher. Storage and Stability: May be stored at 4°C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20°C. Aliquots are stable for 12 months after receipt. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.
- Versandbedingungen:
- Blue Ice