{"product_id":"cst-53085s","title":"CST,  53085S, Phospho-eIF2 alpha (Ser51) (E8U8L) Mouse Monoclonal Antibody","description":"Monoclonal Antibody for studying EIF2S1\/eIF2-alpha (Ser52) phosphate. Validated for Western Blotting. Available in 2 sizes. Highly specific and rigorously validated in-house, Phospho-eIF2 alpha (Ser51) (E8U8L) Mouse Monoclonal Antibody (CST #53085) is ready to ship.\n\n\u003cb\u003eProduct Usage Information\u003c\/b\u003e\nWestern Blotting: 1:1000\n\u003cb\u003eStorage\u003c\/b\u003e\nSupplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 µg\/ml BSA, 50% glycerol and less than 0.02% sodium azide. Store at -20°C. Do not aliquot the antibody.\n\u003cb\u003eProtocol\u003c\/b\u003e\nAvailable protocols: Western Blotting\n\u003cb\u003eSpecificity \/ Sensitivity\u003c\/b\u003e\nPhospho-eIF2 alpha (Ser51) (E8U8L) Mouse Monoclonal Antibody recognizes endogenous levels of eIF2α protein only when phosphorylated at Ser51. Human eIF2alpha residue Ser52 historically has been referenced as Ser51.\nSpecies Reactivity: Human, Mouse, Rat\n\u003cb\u003eSource \/ Purification\u003c\/b\u003e\nMonoclonal antibody is produced by immunizing animals with a synthetic phosphopeptide corresponding to residues surrounding Ser52 of human eIF2α protein. Amino acid Ser52 of human eIF2α protein corresponds to amino acid Ser51 of rabbit eIF2α protein.\n\u003cb\u003eBackground\u003c\/b\u003e\nPhosphorylation of the eukaryotic initiation factor 2 (eIF2) α subunit is a well-documented mechanism to downregulate protein synthesis under a variety of stress conditions. eIF2 binds GTP and Met-tRNAi and transfers Met-tRNA to the 40S subunit to form the 43S preinitiation complex (1,2). eIF2 promotes a new round of translation initiation by exchanging GDP for GTP, a reaction catalyzed by eIF2B (1,2). Kinases that are activated by viral infection (PKR), endoplasmic reticulum stress (PERK\/PEK), amino acid deprivation (GCN2), or heme deficiency (HRI) can phosphorylate the α subunit of eIF2 (3,4). This phosphorylation stabilizes the eIF2-GDP-eIF2B complex and inhibits the turnover of eIF2B. Induction of PKR by IFN-γ and TNF-α induces potent phosphorylation of eIF2α at Ser51 (5,6).\n\u003cb\u003eAlternate Names\u003c\/b\u003e\nEIF-2; eIF-2-alpha; eIF-2A; eIF-2alpha; EIF2; eIF2-alpha; EIF2A; EIF2S1; Eukaryotic translation initiation factor 2 subunit 1; Eukaryotic translation initiation factor 2 subunit alpha; eukaryotic translation initiation factor 2, subunit 1 alpha, 35kDa; IF2A\n\n\u003cb\u003eSpecification\u003c\/b\u003e\n\nREACTIVITY: H M R\nSENSITIVITY: Endogenous\nMW (kDa): 38\nSource\/Isotype: Mouse IgG1 kappa","brand":"CST","offers":[{"title":"Default Title","offer_id":46799796797609,"sku":"53085S","price":0.99,"currency_code":"USD","in_stock":true}],"url":"https:\/\/iright.com\/products\/cst-53085s","provider":"Iright","version":"1.0","type":"link"}