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Custom Ordering Details: Product is assembled upon order to ensure maximum activity. United States: Please allow up to two weeks for your order to be processed and shipped. Outside of the United States: Please allow up to three weeks, depending on the country, for your order to be processed and shipped. When ordering five or more kits, please contact us for processing time and pricing at sales@cellsignal.com.
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PhosphoSitePlus® Resource

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Product Description

CST's PathScan® Phospho-Insulin Receptor β (Tyr1345) Sandwich ELISA Antibody Pair is being offered as an economical alternative to our PathScan® Phospho-Insulin Receptor β (Tyr1345) Sandwich ELISA Kit #7326. Capture and detection antibodies (100X stocks) and HRP-conjugated secondary antibody (1000X stock) are supplied. Sufficient reagents are supplied for 4 x 96 well ELISAs. The phospho-insulin receptor β (Tyr1345) capture antibody is coated on a 96 well microplate in PBS overnight. After blocking, cell lysates are added followed by an insulin receptor β detection antibody and anti-mouse IgG, HRP conjugated antibody. HRP substrate, TMB, is added for color development. The magnitude of the absorbance for this developed color is proportional to the quantity of phospho-insulin receptor β (Tyr1345) protein.


Product Usage Information

Storage: Capture and detection antibodies are stored at 4°C. HRP-linked secondary reagent is stored at -20°C.

Specificity / Sensitivity

For Antibody Pair specificity and sensitivity, please refer to the corresponding PathScan® Sandwich ELISA Kit. Note: This antibody pair detects proteins from the indicated species, as determined through in-house testing, but may also detect homologous proteins from other species.


Type I insulin-like growth factor receptor (IGF-IR) is a transmembrane receptor tyrosine kinase that is widely expressed in many cell lines and cell types within fetal and postnatal tissues (1-3). Receptor autophosphorylation follows binding of the IGF-I and IGF-II ligands. Three tyrosine residues within the kinase domain (Tyr1131, Tyr1135, and Tyr1136) are the earliest major autophosphorylation sites (4). Phosphorylation of these three tyrosine residues is necessary for kinase activation (5,6). Insulin receptors (IRs) share significant structural and functional similarity with IGF-I receptors, including the presence of an equivalent tyrosine cluster (Tyr1146/1150/1151) within the kinase domain activation loop. Tyrosine autophosphorylation of IRs is one of the earliest cellular responses to insulin stimulation (7). Autophosphorylation begins with phosphorylation at Tyr1146 and either Tyr1150 or Tyr1151, while full kinase activation requires triple tyrosine phosphorylation (8).


1.  Adams, T.E. et al. (2000) Cell Mol Life Sci 57, 1050-93.

2.  Baserga, R. (2000) Oncogene 19, 5574-81.

3.  Scheidegger, K.J. et al. (2000) J Biol Chem 275, 38921-8.

4.  Hernández-Sánchez, C. et al. (1995) J Biol Chem 270, 29176-81.

5.  Lopaczynski, W. et al. (2000) Biochem Biophys Res Commun 279, 955-60.

6.  Baserga, R. (1999) Exp Cell Res 253, 1-6.

7.  White, M.F. et al. (1985) J Biol Chem 260, 9470-8.

8.  White, M.F. et al. (1988) J Biol Chem 263, 2969-80.


Entrez-Gene Id 3643
Swiss-Prot Acc. P06213


For Research Use Only. Not For Use In Diagnostic Procedures.
Cell Signaling Technology is a trademark of Cell Signaling Technology, Inc.
PathScan is a trademark of Cell Signaling Technology, Inc.

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PathScan® Phospho-Insulin Receptor β (Tyr1345) Sandwich ELISA Antibody Pair