Human Phospho-STAT3 (Y705) Antibody

Catalog # Availability Size / Price Qty
Detection of Human Phospho‑STAT3 (Y705) by Western Blot.
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Product Details
Citations (2)
Supplemental Products

Human Phospho-STAT3 (Y705) Antibody Summary

Species Reactivity
Detects human STAT3 when phosphorylated at Y705.
Monoclonal Rat IgG2B Clone # 805435
Protein A or G purified from hybridoma culture supernatant
Phosphopeptide containing the human STAT3 Y705 site
Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied either lyophilized or as a 0.2 µm filtered solution in PBS.


Recommended Concentration
Western Blot
2 µg/mL
See below

Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.

Scientific Data

Western Blot Detection of Human Phospho-STAT3 (Y705) antibody by Western Blot. View Larger

Detection of Human Phospho‑STAT3 (Y705) by Western Blot. Western blot shows lysates of Daudi human Burkitt's lymphoma cell line and HepG2 human hepatocellular carcinoma cell line untreated (-) or treated (+) with 500 U/mL Recombinant Human IFN-aA (Catalog # 11100-1) for 20 minutes or 50 µg/mL Recombinant Human IL-6 (Catalog # 206-IL) for 15 minutes. PVDF membrane was probed with 2 µg/mL of Rat Anti-Human Phospho-STAT3 (Y705) Monoclonal Antibody (Catalog # MAB4607) followed by HRP-conjugated Anti-Rat IgG Secondary Antibody (Catalog # HAF005). A specific band was detected for Phospho-STAT3 (Y705) at approximately 95 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.

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Preparation and Storage

Sterile PBS to a final concentration of 0.5 mg/mL.
Reconstitution Buffer Available
Reconstitution Buffer 1 (PBS)
Catalog #
Size / Price
The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. *Small pack size (SP) is shipped with polar packs. Upon receipt, store it immediately at -20 to -70 °C
Stability & Storage
Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  • 12 months from date of receipt, -20 to -70 °C as supplied.
  • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
  • 6 months, -20 to -70 °C under sterile conditions after reconstitution.

Background: STAT3

Human STAT-3/STAT3a (signal transducer and activator of transcription 3; also called APRF) is a 90-95 kDa member of the STAT family of transcription factors. It is 770 amino acids (aa) in length, contains one SH2 domain (aa 580-670), and is found in almost all cell types. STAT3 mediates gp130, LIF-R, OB-R, IL10-R and EGFR signaling. Upon activation, receptors such as gp130 phosphorylate STAT3 at Ser727, which results in transcriptional activation. Phosphorylation at Tyr705 mediates homo- and hetero-dimerization with STAT1 and nuclear translocation, and is an important event in oncogenic transformation. The STAT3b isoform shows a six aa substitution for aa 716-770, thus eliminating the Ser727 site. Human and mouse STAT3a share 99% aa sequence identity.

Long Name
Signal Transducer and Activator of Transcription 3
Entrez Gene IDs
6774 (Human); 20848 (Mouse); 25125 (Rat)
Alternate Names
Acute-phase response factor; APRFMGC16063; DNA-binding protein APRF; FLJ20882; HIES; signal transducer and activator of transcription 3 (acute-phase responsefactor); signal transducer and activator of transcription 3; STAT3

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Citations for Human Phospho-STAT3 (Y705) Antibody

R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.

2 Citations: Showing 1 - 2
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  1. Tumor-derived mesenchymal-stem-cell-secreted IL-6 enhances resistance to cisplatin via the STAT3 pathway in breast cancer
    Authors: H Xu, Y Zhou, W Li, B Zhang, H Zhang, S Zhao, P Zheng, H Wu, J Yang
    Oncol Lett, 2018;15(6):9142-9150.
    Species: Human
    Sample Types: Cell Lysates
    Applications: Western Blot
  2. Compensatory anabolic signaling in the sarcopenia of experimental chronic arthritis
    Authors: RD Little, I Prieto-Pot, S Pérez-Baos, A Villalvill, P Gratal, F Cicuttini, R Largo, G Herrero-Be
    Sci Rep, 2017;7(1):6311.
    Species: Rabbit
    Sample Types: Tissue Homogenates
    Applications: Western Blot


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