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Anti-Phosphotyrosine Antibody

Upstate®, from rabbit

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biological source


Quality Level

antibody form

affinity purified immunoglobulin

antibody product type

primary antibodies



purified by

affinity chromatography

species reactivity


species reactivity (predicted by homology)

all (based on 100% sequence homology)




immunoprecipitation (IP): suitable
western blot: suitable

shipped in

wet ice

target post-translational modification

acetylation (test)

Gene Information

human ... PID1(55022)

General description

The phosphorylation of specific tyrosine residues has been shown to be a primary mechanism of signal transduction during normal mitogenesis, cell cycle progression and oncogenic transformation, its role in other areas such as differentiation and gap junction communication, is a matter of active and ongoing research. Antibodies that specifically recognize phosphorylated tyrosine residues have proved to be invaluable to the study of tyrosine phosphorylated proteins and the biochemical pathways in which they function.


The immunoreactivity of the antibody is totally inhibited by the use of 100 mM phenyl phosphate, a phosphotyrosine analog. The phosphotyrosine antibody is purified by immunoaffinity chromatography using either a dual phospho-peptide gel or a BSA-phosphotyrosine gel. All of the phosphotyrosine immunoreactivity present in the antisera is immunoadsorbed whether the antibody is purified by either gel indicating that the antibody is not sequence-specific but specific for phosphotyrosine residues.


In order to produce broad spectrum polyclonal phosphotyrosine antibodies, rabbits were immunized with three phosphorylated immunogens: (1) phosphotyrosine covalently linked to KLH; (2) the c-Src carboxyl terminal regulatory phosphopeptide (TS-T-E-P-Q-pY-Q-P-G-E-N-L; Catalog # 12-218) covalently linked to KLH, and; (3) a phosphopeptide associated with high tyrosine kinase activity in human lymphocytes (R-R-L-I-E-D-A-E-pY-A-A-R-G; Catalog # 12-217) covalently linked to KLH. Both of the phosphopeptide haptens serve as strong substrates for tyrosine phosphatases and are part of the two colorimetric tyrosine phosphatase kits provided by Upstate, Inc. (Catalog # 17-125, 17-126).


Anti-Phosphotyrosine Antibody detects level of Phosphotyrosine & has been published & validated for use in IP & WB.
Research Category
Research Sub Category
General Post-translation Modification

Signaling Neuroscience
Western Blotting Analysis: A 1:500 dilution from a representative lot detected Phosphotyrosine in 10 µg of EGF treated A431 with Lambda Phosphatase tissue lysate.
Immunoprecipitation Analysis: 5 µL from a representative lot immunoprecipitated Phosphotyrosine in 0.5 mg of EGF treated A431 cell lysate


Evaluated by Western Blotting in EGF treated A431 cell lysate.

Western Blotting Analysis: A 1:500 dilution of this antibody detected Phosphotyrosine in 10 µg of EGF treated A431 cell lysate.

Target description


Physical form

Affinity purified
Purified rabbit polyclonal in buffer containing 0.1 M Tris-Glycine (pH 7.4), 150 mM NaCl with 0.05% sodium azide.

Storage and Stability

Stable for 1 year at 2-8°C from date of receipt.

Analysis Note

Positive Antigen Control: Catalog #12-302, EGF-stimulated A431 cell lysate. Add 2.5µL of 2-mercaptoethanol/100µL of lysate and boil for 5 minutes to reduce the preparation. Load 20µg of reduced lysate per lane for minigels.

Other Notes

Concentration: Please refer to the Certificate of Analysis for the lot-specific concentration.

Legal Information

UPSTATE is a registered trademark of Merck KGaA, Darmstadt, Germany


Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.

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