{"product_id":"cst-3574s","title":"CST,  3574S, CD19 Antibody","description":"Polyclonal Antibody for studying CD19. Validated for WB,IP,IF,F. Highly specific and rigorously validated in-house, CD19 Antibody (CST #3574) is ready to ship.\n\n\u003cb\u003eProduct Usage Information\u003c\/b\u003e\nWestern Blotting: 1:1000\nImmunoprecipitation: 1:50\nImmunofluorescence (Immunocytochemistry): 1:50\nFlow Cytometry (Fixed\/Permeabilized): 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, Immunoprecipitation, Immunofluorescence (Immunocytochemistry), Flow Cytometry (Fixed\/Permeabilized)\n\u003cb\u003eSpecificity \/ Sensitivity\u003c\/b\u003e\nCD19 Antibody detects endogenous levels of CD19 independent of its phosphorylated state.\nSpecies Reactivity: Human, Mouse\n\u003cb\u003eSource \/ Purification\u003c\/b\u003e\nPolyclonal antibodies are produced by immunizing animals with a synthetic peptide corresponding to residues around the carboxy-terminus of human CD19. Antibodies are purified by protein A and peptide affinity chromatography.\n\u003cb\u003eBackground\u003c\/b\u003e\nCD19 is a 95 kDa coreceptor which amplifies the signaling cascade in B cells (1). On the B cell surface, CD19 associates with CD21, CD81, and Leu-13 to exert its function. The cytoplasmic tail of CD19 has nine conserved tyrosine residues playing critical roles in CD19 mediated function by coupling signaling molecules to the receptor (1). After B cell receptor or CD19 ligation, Tyr531 and Tyr500 of CD19 are progressively phosphorylated. This phosphorylation enables the coupling of PI3 kinase and Src family tyrosine kinase to CD19 and activates the PI3K and Src signaling pathways (2,3). Coligation of B cell receptor and CD19 also promotes Tyr409 phosphorylation in CD19. The phosphorylation at these sites enables its binding to Vav and mediates elevated intracellular calcium response, as well as the JNK pathway (4,5).\n\u003cb\u003eAlternate Names\u003c\/b\u003e\nB-lymphocyte antigen CD19; B-lymphocyte surface antigen B4; B4; CD19; CD19 antigen; CD19 molecule; CVID3; Differentiation antigen CD19; MGC12802; T-cell surface antigen Leu-12\n\n\u003cb\u003eSpecification\u003c\/b\u003e\n\nREACTIVITY: H M\nSENSITIVITY: Endogenous\nMW (kDa): 95\nSOURCE: Rabbit","brand":"CST","offers":[{"title":"Default Title","offer_id":46799431991465,"sku":"3574S","price":0.99,"currency_code":"USD","in_stock":true}],"url":"https:\/\/iright.com\/products\/cst-3574s","provider":"Iright","version":"1.0","type":"link"}