{"product_id":"cst-9721l","title":"CST,  9721L, Phospho-eIF2 alpha (Ser51) Antibody","description":"Polyclonal Antibody for studying EIF2S1\/eIF2-alpha (Ser52) phosphate. Validated for Western Blotting,Simple Western™. Available in 2 sizes. Highly specific and rigorously validated in-house, Phospho-eIF2 alpha (Ser51) Antibody (CST #9721) is ready to ship.\n\n\u003cb\u003eProduct Usage Information\u003c\/b\u003e\nWestern Blotting: 1:1000\nSimple Western™: 1:10 - 1:50\n\u003cb\u003eStorage\u003c\/b\u003e\nSupplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 µg\/ml BSA and 50% glycerol. 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) Antibody detects endogenous eIF2alpha only when phosphorylated at Ser51. This antibody does not recognize elF2alpha phosphorylated at other sites. Human eIF2alpha residue Ser52 historically has been referenced as Ser51.\nSpecies Reactivity: Human, Mouse, Rat, Monkey, D. melanogaster\n\u003cb\u003eSource \/ Purification\u003c\/b\u003e\nPolyclonal antibodies are produced by immunizing animals with a synthetic phosphopeptide corresponding to residues surrounding Ser51 of human eIF2alpha. Antibodies are purified by protein A and peptide affinity chromatography.\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 Mk Dm\nSENSITIVITY: Endogenous\nMW (kDa): 38\nSOURCE: Rabbit","brand":"CST","offers":[{"title":"Default Title","offer_id":46800061759657,"sku":"9721L","price":0.99,"currency_code":"USD","in_stock":true}],"url":"https:\/\/iright.com\/products\/cst-9721l","provider":"Iright","version":"1.0","type":"link"}