Cell Signaling Technology

Product Pathways - Tyrosine Kinase / Adaptors

PathScan® Phospho-Ret (panTyr) Chemiluminescent Sandwich ELISA Kit #12321

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Kit Includes Volume Solution Color
Ret Rabbit mAb Coated Microwells 96 tests
Phospho-Tyrosine Mouse Detection mAb 5.5 ml Green
Anti-mouse IgG, HRP-linked Antibody 5.5 ml Red
Luminol/Enhancer Solution 3 ml Colorless
Stable Peroxide Buffer 3 ml Colorless
Sealing Tape 2 sheets
ELISA Wash Buffer (20X) 25 ml Colorless
ELISA Sample Diluent 25 ml Blue
Cell Lysis Buffer (10X) #9803 15 ml Yellowish

Note: 12 8-well modules –Each module is designed to break apart for 8 tests.
Note: Kit should be stored at 4°C with the exception of Cell Lysis Buffer, which is stored at –20°C (packaged separately).

Species Cross-Reactivity

H

Reactivity Key:  H=Human
Species enclosed in parentheses are predicted to react based on 100% sequence homology.

Description

The PathScan® Phospho-Ret (panTyr) Chemiluminescent Sandwich ELISA Kit is a solid phase sandwich enzyme-linked immunosorbent assay (ELISA) that detects endogenous levels of tyrosine-phosphorylated Ret protein with a chemiluminescent readout. Chemiluminescent ELISAs often have a wider dynamic range and higher sensitivity than conventional chromogenic detection. This chemiluminescent ELISA, which is offered in low volume microplates, shows increased signal and sensitivity while using a smaller sample size. A Ret Rabbit mAb has been coated onto the microwells. After incubation with cell lysates, Ret protein (phospho and nonphospho) is captured by the coated antibody. Following extensive washing, a Phospho-Tyrosine Mouse Detection mAb is added to detect captured tyrosine-phosphorylated Ret protein. Anti-mouse IgG, HRP-linked Antibody is then used to recognize the bound detection antibody. Chemiluminescent reagent is added for signal development. The magnitude of light emission, measured in relative light units (RLU), is proportional to the quantity of tyrosine-phosphorylated Ret protein.Antibodies in kit are custom formulations specific to kit.

Specificity / Sensitivity

PathScan® Phospho-Ret (panTyr) Chemiluminescent Sandwich ELISA Kit #12321 detects endogenous levels of tyrosine-phosphorylated Ret protein in human cells. This kit detects proteins from the indicated species, as determined through in-house testing, but may also detect homologous proteins from other species.

Figure 1. The relationship between protein concentration of lysates, untreated (Nonphospho) and phosphatase inhibitor treated (Phospho), and immediate light generation with chemiluminescent substrate is shown. TT cells were cultured (85% confluent) and lysed with the addition of phosphatase inhibitor to the PathScan® Sandwich ELISA Cell Lysis Buffer (1X) #9803. Graph inset corresponding to the shaded area shows high sensitivity and a linear response at the low protein concentration range.

Background

The Ret proto-oncogene (c-Ret) is a receptor tyrosine kinase that functions as a multicompetent receptor complex in conjunction with other membrane-bound, ligand-binding GDNF family receptors (1). Ligands that bind the Ret receptor include the glial cell line-derived neurotropic factor (GDNF) and its congeners neurturin, persephin, and artemin (2-4). Research studies have shown that alterations in the corresponding RET gene are associated with diseases including papillary thyroid carcinoma, multiple endocrine neoplasia (type 2A and 2B), familial medullary thyroid carcinoma, and a congenital developmental disorder known as Hirschsprung’s disease (1,3). The Tyr905 residue located in the Ret kinase domain plays a crucial role in Ret catalytic and biological activity. Substitution of Phe for Tyr at position 905 dramatically inhibits Ret autophosphorylation activity (5).

  1. Airaksinen, M.S. et al. (1999) Mol. Cell. Neurosci. 13, 313-325.
  2. Takahashi, M. et al. (1989) Oncogene 4, 805-806.
  3. Manie, S. et al. (2001) Trends Genet. 17, 580-589.
  4. Tallini, G. and Asa, S. (2001) Adv. Anat. Pathol. 8, 345-354.
  5. Iwashita, T. et al. (1999) Oncogene 18, 3919-3922.

Application References

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Protocols

* Product-specific protocol.

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For Research Use Only. Not For Use In Diagnostic Procedures.

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