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Rabbit Polyclonal to PAG / Cbp

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Background

PAG (phosphoprotein associated with GEMs), also known as Cbp (Csk-binding protein), is a ubiquitously expressed 46 kDa transmembrane adaptor protein present in membrane rafts (glycosphingolipid-enriched microdomains), which however migrates on SDS PAGE gels anomalously as an 80 kDa molecule. Following tyrosine phosphorylation by Src family kinases, PAG binds and thereby activates the protein tyrosine kinase Csk, the major negative regulator of the Src family kinases. Signaling via the B-cell receptor in B cells or high affinity IgE receptor (FcepsilonRI) in mast cells leads to PAG increased tyrosine phosphorylation and Csk binding, while T cell receptor signaling causes PAG dephosphorylation, loss of Csk binding and increased activation of the protein tyrosine kinase Lck.

Specificity

The polyclonal antibody recognizes Csk-binding protein (Cbp / PAG), a 46 kDa ubiquitously expressed transmembrane adaptor protein present in membrane rafts (glycosphingolipid-enriched microdomains), which however migrates on SDS PAGE gels anomalously as an 80 kDa molecule.

Regulatory Status

Immunogen

Recombinant intracellular fragment (aa 97-432) of human Cbp (PAG).

Species Reactivity:

  • Human
  • Mouse

Negative Species:

Applications:

  • Immunoprecipitation
  • Western Blotting
  • Immunohistochemistry (paraffin sections)
    Positive tissue:tonsil, colon germinal center
Usage note:
Indicated dilutions are recommended starting points for use of this product. Working concentrations should be determined by the investigator.

References

  • Unpublished.
  • For research use only. Not for drug, diagnostic or other use.

    Related Products

  • Mouse Monoclonal to PAG / Cbp MEM-255 (IgG2a)
  • Example Data

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