Description_x000D_ General description_x000D_ RPS6KA5 (Ribosomal protein S6 kinase a-5) encodes a serine/threonine-protein kinase consisting of two protein kinase domains in a single polypeptide. It is also called as mitogen and stress-activated protein kinase-1 (MSK-1)._x000D_ Immunogen_x000D_ Ribosomal protein S6 kinase α-5 recombinant protein epitope signature tag (PrEST)_x000D_ Application_x000D_ Anti-RPS6KA5 antibody produced in rabbit, a Prestige Antibody, is developed and validated by the Human Protein Atlas (HPA) project (www.proteinatlas.org). Each antibody is tested by immunohistochemistry against hundreds of normal and disease tissues. These images can be viewed on the Human Protein Atlas (HPA) site by clicking on the Image Gallery link. The antibodies are also tested using immunofluorescence and western blotting. To view these protocols and other useful information about Prestige Antibodies and the HPA, visit sigma.com/prestige._x000D_ Physical form_x000D_ Solution in phosphate-buffered saline, pH 7.2, containing 40% glycerol and 0.02% sodium azide_x000D_ Disclaimer_x000D_ Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals._x000D_ Legal Information_x000D_ Prestige Antibodies is a registered trademark of Sigma-Aldrich Co. LLC_x000D_ Biochem/physiol Actions_x000D_ RPS6KA5 (Ribosomal protein S6 kinase α-5) plays an essential role in mitogen or stress-induced phosphorylation of transcription factors CREB1 and ATF1. It associates and phosphorylates p65, a subunit of NF-κB, at Ser276 leading to transcriptional activation of NF-κB-dependent gene expression. It regulates mitogen and stress-induced phosphorylation of histone H3 and high-mobility-group protein (HMG)-14 in association with mitogen and stress-activated protein kinase-2 (MSK2). The protein is involved in erythropoietin-induced serine 727 phosphorylation of STAT3 in association with MEK, ERK. It mediates the regulation of ER81 transcription factor, that is involved in ontogenesis and breast tumor formation._x000D_ Features and Benefits_x000D_ Prestige Antibodies® are highly characterized and extensively validated antibodies with the added benefit of all available characterization data for each target being accessible via the Human Protein Atlas portal linked just below the product name at the top of this page. The uniqueness and low cross-reactivity of the Prestige Antibodies® to other proteins are due to a thorough selection of antigen regions, affinity purification, and stringent selection. Prestige antigen controls are available for every corresponding Prestige Antibody and can be found in the linkage section._x000D_ Every Prestige Antibody is tested in the following ways:_x000D_ • IHC tissue array of 44 normal human tissues and 20 of the most common cancer type tissues._x000D_ • Protein array of 364 human recombinant protein fragments._x000D_ • Validated for multiple commonly used applications such as IHC (Immunohistochemistry), IF (Immunofluorescence), and WB (Western Blot)_x000D_ Linkage_x000D_ Corresponding Antigen APREST70505.