Brilliant Violet 421™ anti-STAT3 Phospho (Tyr705) Antibody

Pricing & Availability
13A3-1 (See other available formats)
Other Names
Signal transducer and activator of transcription 3, Acute-phase response factor, APRF, HIES
Mouse IgG1, κ
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Product Citations
Human whole blood was stimulated with (top) or without (bottom) IL-6 for 15 minutes, then treated with RBC Lysis/Fixation Solution, and permeabilized with True-Phos™ Perm Buffer, then stained with CD3 APC and STAT3 pY705 (clone 13A3-1) Brilliant Violet 421™.
  • 13A3-1_BV421_STAT3_Phospho_Tyr705_Antibody_1_032416
    Human whole blood was stimulated with (top) or without (bottom) IL-6 for 15 minutes, then treated with RBC Lysis/Fixation Solution, and permeabilized with True-Phos™ Perm Buffer, then stained with CD3 APC and STAT3 pY705 (clone 13A3-1) Brilliant Violet 421™.
  • 13A3-1_BV421_STAT3_Phospho_Tyr705_Antibody_2_032416
See Brilliant Violet 421™ spectral data See supplemental data...
Cat # Size Price Save
651009 25 tests ¥33,000
651010 100 tests ¥75,000

Tyrosine phosphorylation of STAT3 at Tyr705 occurs in response to LIF, IL-6, leptin, OSM, EGF, PDGF, and HGF. It plays a key role in cell growth and apoptosis through mediating expression of a variety of genes in response to the stimuli.

Product Details
Technical data sheet

Product Details

Human, Mouse
Antibody Type
Host Species
KLH conjugated modified synthetic peptide
Phosphate-buffered solution, pH 7.2, containing 0.09% sodium azide and BSA (origin USA).
The antibody was purified by affinity chromatography and conjugated with Brilliant Violet 421™ under optimal conditions.
Lot-specific (please contact technical support for concentration and total µg amount, or use our Lookup tool if you have a lot number.)
Storage & Handling
The antibody solution should be stored undiluted between 2°C and 8°C, and protected from prolonged exposure to light. Do not freeze.

ICFC - Quality tested

Recommended Usage

Each lot of this antibody is quality control tested by intracellular flow cytometry using our True-Phos™ Perm Buffer in Whole Blood Protocol. For flow cytometric staining, the suggested use of this reagent is 5 µl per million cells in 100 µl staining volume or 5 µl per 100 µl of whole blood.

Brilliant Violet 421™ excites at 405 nm and emits at 421 nm. The standard bandpass filter 450/50 nm is recommended for detection. Brilliant Violet 421™ is a trademark of Sirigen Group Ltd.

Learn more about Brilliant Violet™.

This product is subject to proprietary rights of Becton, Dickinson and Company and its affiliates. The purchase of this product conveys to the buyer a non-transferable right to use the purchased product for research purposes only. This product may not be resold or incorporated in any manner into another product for resale. Any use for therapeutics or diagnostics is strictly prohibited. This product is covered by U.S. patent(s), pending patent applications and/or foreign equivalents.
Excitation Laser
Violet Laser (405 nm)
Application Notes

The STAT3 Phospho (Tyr705) antibody recognizes the regulatory tyrosine phosphorylation of human STAT3 protein and has been shown to be useful for Western blotting.

Product Citations
  1. Golebski K, et al. 2019. Nat Commun. 10:2162. PubMed
  2. Ligorio M, et al. 2019. Cell. 178:160. PubMed
  3. Rivadeneira DB, et al. 2020. Immunity. 51(3):548-560. PubMed
  4. Hering L, et al. 2020. Front Immunol. 1.747222222. PubMed
  5. Golebski K, et al. 2021. Immunity. 54(2):291-307.e7. PubMed
AB_2572087 (BioLegend Cat. No. 651009)
AB_2572088 (BioLegend Cat. No. 651010)

Antigen Details

STAT3 is a 770 amino acid protein of 88 kD. It consists of a DNA binding domain, a SH2 domain, a regulatory tyrosine responsible for binding of SH2 domain, and a C-terminal transactivation domain.


STAT3 is tyrosine phosphorylated by receptor kinases in response to a variety of cytokines and growth factors. It forms homo- or heterodimer with STAT1 when tyrosine is phosphorylated, and then translocates to nucleus, acting as a transcription regulator. It is also essential for the differentiation of TH17 cells, which is involved in autoimmune diseases.
Cell Sources
Cytoplasm. Translocate to nucleus in response to tyrosine phosphorylation.
Cell Type
Embryonic Stem Cells, Neural Stem Cells
Biology Area
Cell Biology, Neuroscience, Neuroscience Cell Markers, Signal Transduction, Stem Cells, Synaptic Biology, Transcription Factors
Molecular Family
Antigen References

1. Akira S, et al. 1994. Cell 77:63.
2. Zhang X, et al. 1995. Science 267:1990.
3. Sanchez-Margalet V, et al. 2001. Cell. Immunol. 211:30.
4. Simon A, et al. 2000. Science 290:144.
5. Hoey T, et al. 1999. Adv. Immunol. 71:145.

The small GTPase Rac1 binds and regulates activity of STAT3.
Gene ID
6774 View all products for this Gene ID
View information about STAT3 Phospho on

Related FAQs

What is the F/P ratio range of our BV421™ format antibody reagents?

It is lot-specific. On average it ranges between 2-4.

Go To Top Version: 4    Revision Date: 07/27/2016

For research use only. Not for diagnostic use. Not for resale. BioLegend will not be held responsible for patent infringement or other violations that may occur with the use of our products.


*These products may be covered by one or more Limited Use Label Licenses (see the BioLegend Catalog or our website, BioLegend products may not be transferred to third parties, resold, modified for resale, or used to manufacture commercial products, reverse engineer functionally similar materials, or to provide a service to third parties without written approval of BioLegend. By use of these products you accept the terms and conditions of all applicable Limited Use Label Licenses. Unless otherwise indicated, these products are for research use only and are not intended for human or animal diagnostic, therapeutic or commercial use.


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Toll-Free Phone: 1-877-Bio-Legend (246-5343) Phone: (858) 768-5800 Fax: (877) 455-9587

This data display is provided for general comparisons between formats.
Your actual data may vary due to variations in samples, target cells, instruments and their settings, staining conditions, and other factors.
If you need assistance with selecting the best format contact our expert technical support team.

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