Date published: 2025-12-19

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Phosphotyrosine Antibody (PY99): sc-7020

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Datasheets
  • Phosphotyrosine Antibody (PY99) is a mouse monoclonal IgG2b κ, cited in 2,689 publications, provided at 200 µg/ml
  • raised against p-Tyr
  • Phosphotyrosine Antibody (PY99) is recommended for detection of phosphotyrosine-containing proteins by WB, IP, IF and IHC(P); non cross-reactive with phosphoserine or phosphothreonine
  • Anti-Phosphotyrosine Antibody (PY99) is available conjugated to agarose for IP; HRP for WB, IHC(P) and ELISA; and to either phycoerythrin or FITC for IF, IHC(P) and FCM
  • also available conjugated to Alexa Fluor® 488, Alexa Fluor® 546, Alexa Fluor® 594 or Alexa Fluor® 647 for WB (RGB), IF, IHC(P) and FCM, and for use with RGB fluorescent imaging systems, such as iBright™ FL1000, FluorChem™, Typhoon, Azure and other comparable systems
  • also available conjugated to Alexa Fluor® 680 or Alexa Fluor® 790 for WB (NIR), IF and FCM; for use with Near-Infrared (NIR) detection systems, such as LI-COR®Odyssey®, iBright™ FL1000, FluorChem™, Typhoon, Azure and other comparable systems
  • available conjugated to biotin for WB, IHC(P) and ELISA; and to Alexa Fluor® 405 for IF, IHC(P) and FCM
  • At present, we have not yet completed the identification of the preferred secondary detection reagent(s) for Phosphotyrosine Antibody (PY99). This work is in progress.

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SEE ALSO...

p-Tyr Antibody (PY99) is a mouse monoclonal IgG2b kappa light chain antibody that detects phosphorylated tyrosine protein across broad species through western blotting (WB), immunoprecipitation (IP), immunofluorescence (IF), and immunohistochemistry. p-Tyr (PY99) antibody comes in non-conjugated forms and various conjugates, including agarose, horseradish peroxidase (HRP), phycoerythrin (PE), fluorescein isothiocyanate (FITC), and multiple Alexa Fluor® options, offering flexibility for diverse experimental needs. Protein tyrosine phosphorylation plays a crucial role in cellular signaling pathways, serving as a key regulatory mechanism in numerous biological processes, including cell growth, differentiation, and metabolism. Phosphorylation of tyrosine residues occurs primarily through protein tyrosine kinases, which include receptor tyrosine kinases and non-receptor tyrosine kinases, with the Src family representing a classic example of the latter. These kinases typically localize to the plasma membrane′s inner surface, where they interact with surface receptors to transmit signals within cells. When receptor tyrosine kinases bind to ligands, they undergo dimerization and autophosphorylation, creating specific phosphotyrosine sites that dock downstream signaling molecules. This complex network highlights the significance of studying phosphotyrosine modifications, making anti-p-Tyr antibody (PY99) essential for researchers studying and purifying proteins containing phosphotyrosyl residues, ultimately advancing cellular signaling research.

For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.

Alexa Fluor® is a trademark of Molecular Probes Inc., OR., USA

LI-COR® and Odyssey® are registered trademarks of LI-COR Biosciences

Phosphotyrosine Antibody (PY99) References:

  1. Purification of the platelet-derived growth factor receptor by using an anti-phosphotyrosine antibody.  |  Daniel, TO., et al. 1985. Proc Natl Acad Sci U S A. 82: 2684-7. PMID: 2581254
  2. Purification and characterization of a protein-tyrosine kinase encoded by the Abelson murine leukemia virus.  |  Foulkes, JG., et al. 1985. J Biol Chem. 260: 8070-7. PMID: 2989275
  3. Phosphotyrosine profiling of human cerebrospinal fluid.  |  Sathe, G., et al. 2018. Clin Proteomics. 15: 29. PMID: 30220890
  4. Blockade of phosphotyrosine pathways suggesting SH2 superbinder as a novel therapy for pulmonary fibrosis.  |  Wang, M., et al. 2022. Theranostics. 12: 4513-4535. PMID: 35832075
  5. Tumor promoters block tyrosine-specific phosphorylation of the epidermal growth factor receptor.  |  Friedman, B., et al. 1984. Proc Natl Acad Sci U S A. 81: 3034-8. PMID: 6328489
  6. Signalling by receptor tyrosine kinases.  |  Fantl, WJ., et al. 1993. Annu Rev Biochem. 62: 453-81. PMID: 7688944
  7. Regulation of signal transduction and signal diversity by receptor oligomerization.  |  Lemmon, MA. and Schlessinger, J. 1994. Trends Biochem Sci. 19: 459-63. PMID: 7855887
  8. Incorporation of leucocyte GPI-anchored proteins and protein tyrosine kinases into lipid-rich membrane domains of COS-7 cells.  |  Cebecauer, M., et al. 1998. Biochem Biophys Res Commun. 243: 706-10. PMID: 9500981
  9. T cell receptor signalling results in rapid tyrosine phosphorylation of the linker protein LAT present in detergent-resistant membrane microdomains.  |  Brdiĉka, T., et al. 1998. Biochem Biophys Res Commun. 248: 356-60. PMID: 9675140

Ordering Information

Product NameCatalog #UNITPriceQtyFAVORITES

Phosphotyrosine Antibody (PY99)

sc-7020
200 µg/ml
$316.00

Phosphotyrosine Antibody (PY99) AC

sc-7020 AC
500 µg/ml, 25% agarose
$416.00

Phosphotyrosine Antibody (PY99) HRP

sc-7020 HRP
200 µg/ml
$316.00

Phosphotyrosine Antibody (PY99) FITC

sc-7020 FITC
200 µg/ml
$330.00

Phosphotyrosine Antibody (PY99) PE

sc-7020 PE
200 µg/ml
$343.00

Phosphotyrosine Antibody (PY99) Alexa Fluor® 488

sc-7020 AF488
200 µg/ml
$357.00

Phosphotyrosine Antibody (PY99) Alexa Fluor® 546

sc-7020 AF546
200 µg/ml
$357.00

Phosphotyrosine Antibody (PY99) Alexa Fluor® 594

sc-7020 AF594
200 µg/ml
$357.00

Phosphotyrosine Antibody (PY99) Alexa Fluor® 647

sc-7020 AF647
200 µg/ml
$357.00

Phosphotyrosine Antibody (PY99) Alexa Fluor® 680

sc-7020 AF680
200 µg/ml
$357.00

Phosphotyrosine Antibody (PY99) Alexa Fluor® 790

sc-7020 AF790
200 µg/ml
$357.00

Phosphotyrosine Antibody (PY99) B

sc-7020 B
200 µg/ml
$320.00

Phosphotyrosine Antibody (PY99) AP

sc-7020 AP
200 µg/ml

What's the specific phosphorylation site of TEK does this p-Tyr (PY99) combine?

Asked by: xxxxxi
Thank you for your question. Phosphotyrosine Antibody (PY99): sc-7020 is raised against p-Tyr, the specific binding site of this antibody was not characterized.
Answered by: Technical Service SH
Date published: 2023-07-24

What dilutions do you recommend for both the primary and secondary antibodies in .5% BSA for Western Blotting.

Asked by: carolineh325
Thank you for your question. It would be helpful if you could call 800-457-3801, allowing for a more interactive discussion of this and other related questions.
Answered by: Technical Service
Date published: 2022-12-19

Is there anybody know the difference between PY20 and PY99?

Asked by: shaw
Thank you for your question. p-Tyr Antibody (PY99) is recommended for detection of phosphotyrosine-containing proteins by WB, IP, IF and IHC(P); non cross-reactive with phosphoserine or phosphothreonine. p-Tyr Antibody (PY20) is recommended for detection of broad species by WB, IP, IF, IHC(P) and FCM.
Answered by: Technical Support 12
Date published: 2022-06-17

Dear Santa Cruze Do i have to boil/unboil my cell lysate before i use this p-Tyr(PY99) for western blot application?

Asked by: Kenny C
Thank you for your question. Yes, you should boil your lysate before loading it onto your gel.
Answered by: Tech Service
Date published: 2019-11-25

When I use this antibody for immunohistochemistry. Is antigen retrieval necessary?

Asked by: AH2019
Thank you for your question. Yes, we recommend performing an antigen retrieval step if you are doing IHC on formalin fixed paraffin embedded tissue sections.
Answered by: Tech Service
Date published: 2019-10-15

Can I use 10% milk to block when using this antibody? I am interested in getting it conjugated with the alexa 790 to be used with LI-COR®Odyssey®.

Asked by: nsal
Thank you for your question. We recommend blocking in 5% milk with TBS-T, and it should be fine with the LiCOR Odyssey.
Answered by: Tech Service
Date published: 2019-09-24

Is there any species specificity for this antibody? Or is there any cross-reactivity?

Asked by: beni
Thank you for your question. This antibody has broad species reactivity and is specific for phosphotyrosine-containing proteins; non cross-reactive with phosphoserine or phosphothreonine.
Answered by: Technical Support
Date published: 2019-09-11

I want to measure insulin sensitivity and several tyrosine domains are phosphorylated in response to insulin. For example in both insulin receptors and in IRS. Does the antibody detetct all p-tyr, and I differentiate between them depending on weight?

Asked by: Ahmed_hassan
Thank you for your question. Yes, you are correct, this mouse monoclonal antibody, p-Tyr (PY99): sc-7020, specifically detects phosphotyrosine-containing proteins (and does not cross-reactive with phosphoserine or phosphothreonine-containing proteins). If you are using the antibody for Western blotting, then the molecular weight you detect in your samples is representative of different phosphorylated proteins. You would need to do further testing to identify which specific proteins are phosphorylated in your samples.
Answered by: Technical Support
Date published: 2021-04-06
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Rated 3 out of 5 by from Pretty good antibodyThe antibody works pretty well upon IP whereas on total cellular extract is too weak.
Date published: 2020-10-07
Rated 5 out of 5 by from detection of phosphotyrosine-containing proteinsI recommend for detection of phosphotyrosine-containing proteins!
Date published: 2019-12-04
Rated 4 out of 5 by from good pTr antibodyWorks well to detect tyrosine phosphorylation in whole cell or tissue lysates.
Date published: 2018-05-17
Rated 5 out of 5 by from good for WBI use 1:1000 in 5%BSA, it is less specific for mouse lung tissue, I haven't try primary cell but I hope it works.
Date published: 2018-03-12
Rated 4 out of 5 by from Good for WBI tried a 1/500 dilution in 3% BSA and it worked well. Good signal.
Date published: 2017-10-24
Rated 5 out of 5 by from IHC detectionIHC detected the expression of P-Tyr in gastric carcinoma tissues ,it gave cytoplasmic staining ,good signal for us.
Date published: 2017-09-16
Rated 5 out of 5 by from stainingIHC(1/100) staining in human skin tissu, very sensitive
Date published: 2017-09-08
Rated 5 out of 5 by from very goodGives clear for nuclear extracts in western blot; had a strong signal in the western blot.
Date published: 2017-08-17
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Phosphotyrosine Antibody (PY99) is rated 4.7 out of 5 by 31.
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