CST, 94614P, Phospho-Btk (Tyr223) (D1D2Z) Rabbit Monoclonal Antibody (Biotinylated)

Monoclonal Antibody for studying BTK (Tyr223) phosphate. Validated for Peptide ELISA (DELFIA). Highly specific and rigorously validated in-house, Phospho-Btk (Tyr223) (D1D2Z) Rabbit Monoclonal Antibody (Biotinylated) (CST #94614) is ready to ship. Product Usage Information Biotinylated antibodies are ideal for immunoassay technologies and high-throughput ELISA platforms that require antibody pairs where both antibodies are from the same host. Platforms utilizing biotinylated antibodies include, but are not limited to, MSD, xMAP, Quanterix Simoa, AlphaLISA, AlphaScreen, HTRF, LANCE, and TR-FRET. Optimal dilutions/working concentrations should be determined by the end user. Please contact us if you require the antibody clone biotinylated at a different concentration, a carrier-free formulation, or a more customized packaging solution. Storage Supplied in 140 mM NaCl, 3 mM KCl, 10 mM sodium phosphate (pH 7.4) dibasic, 2 mM potassium phosphate monobasic, 2 mg/mL BSA, and 50% glycerol. Store at -20°C. Do not aliquot the antibody. Specificity / Sensitivity Phospho-Btk (Tyr223) (D1D2Z) Rabbit Monoclonal Antibody (Biotinylated) recognizes endogenous levels of Btk protein only when phosphorylated at Tyr223. This antibody detects a 26 kDa protein of unknown identity that is not sensitive to treatment with anti-IgM or Ibrutinib. Species Reactivity: Human, Mouse Source / Purification Monoclonal antibody is produced by immunizing animals with a synthetic phosphopeptide corresponding to residues surrounding Tyr223 of human Btk protein. Background Bruton's tyrosine kinase (Btk) is a member of the Btk/Tec family of cytoplasmic tyrosine kinases. Like other Btk family members, it contains a pleckstrin homology (PH) domain and Src homology SH3 and SH2 domains. Btk plays an important role in B cell development (1,2). Activation of B cells by various ligands is accompanied by Btk membrane translocation mediated by its PH domain binding to phosphatidylinositol-3,4,5-trisphosphate (3-5). The membrane-localized Btk is active and associated with transient phosphorylation of two tyrosine residues, Tyr551 and Tyr223. Tyr551 in the activation loop is transphosphorylated by the Src family tyrosine kinases, leading to autophosphorylation at Tyr223 within the SH3 domain, which is necessary for full activation (6,7). The activation of Btk is negatively regulated by PKCβ through phosphorylation of Btk at Ser180, which results in reduced membrane recruitment, transphosphorylation, and subsequent activation (8). The PKC inhibitory signal is likely to be a key determinant of the B cell receptor signaling threshold to maintain optimal Btk activity (8). Alternate Names Agammaglobulinaemia tyrosine kinase; Agammaglobulinemia tyrosine kinase; AGMX1; AT; ATK; B-cell progenitor kinase; BPK; Bruton agammaglobulinemia tyrosine kinase; Bruton tyrosine kinase; Bruton's tyrosine kinase; BTK; dominant-negative kinase-deficient Brutons tyrosine kinase; IGHD3; IMD1; MGC126261; MGC126262; PSCTK1; truncated Bruton agammaglobulinemia tyrosine kinase; Tyrosine-protein kinase BTK; XLA Specification REACTIVITY: H M SENSITIVITY: Endogenous MW (kDa): 78 Source/Isotype: Rabbit IgG