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A431 cells were either left untreated (-) or treated (+) with 100 ng/ml EGF for 5 minutes at 37°C. The top panel was probed with Stat5 (Cat. No. 610191) and the bottom was probed with Stat5 (pY694) (Cat. No. 611965).
U937 cells were serum starved overnight and treated with GMCSF (15 ng/ml) for 20 minutes. Cells were then fixed with 1% formaldehyde, followed by 80% EtOH, then with BD Cytofix/Cytoperm™ Fixation/Permeabilization Solution Kit (Cat. No. 554714). Cells were then stained with Stat5 (Cat. No. 610191) and Stat5 (pY694) (Cat. No. 611964).
BD Transduction Laboratories™ Purified Mouse Anti-Human Stat5 (pY694)
BD Transduction Laboratories™ Purified Mouse Anti-Human Stat5 (pY694)
Regulatory Status Legend
Any use of products other than the permitted use without the express written authorization of Becton, Dickinson and Company is strictly prohibited.
Preparation And Storage
Product Notices
- Since applications vary, each investigator should titrate the reagent to obtain optimal results.
- Sodium azide is a reversible inhibitor of oxidative metabolism; therefore, antibody preparations containing this preservative agent must not be used in cell cultures nor injected into animals. Sodium azide may be removed by washing stained cells or plate-bound antibody or dialyzing soluble antibody in sodium azide-free buffer. Since endotoxin may also affect the results of functional studies, we recommend the NA/LE (No Azide/Low Endotoxin) antibody format, if available, for in vitro and in vivo use.
- Caution: Sodium azide yields highly toxic hydrazoic acid under acidic conditions. Dilute azide compounds in running water before discarding to avoid accumulation of potentially explosive deposits in plumbing.
- Source of all serum proteins is from USDA inspected abattoirs located in the United States.
- Please refer to www.bdbiosciences.com/us/s/resources for technical protocols.
Stat (Signal transducer and activators of transcription) proteins mediate the biological activity of cytokines, including interleukins, interferons, erythropoietin, and growth factors. Ligand-receptor interaction activates constitutively-associated JAK family kinases and subsequent recruitment/activation of Stat proteins by tyrosine phosphorylation. Active Stat proteins then move to the nucleus to promote transcription of cytokine-inducible genes. Seven Stat proteins have been cloned, each of which is differentially expressed and/or activated in a cytokine-specific and cell type-specific manner. Stat5 has been characterized and shown to be encoded by two separate genes, Stat5a and Stat5b, which share over 90% identity at the amino acid level. Stat5a has been shown to be involved in lactogenesis and mammary development, while Stat5b has been shown to be involved in growth hormone signaling and liver gene expression. Both Stat5a and Stat5b are involved in IL-2 induced peripheral T cell proliferation. The peptide hormone, prolactin, binds to the prolactin receptor (PRLR) to initiate the lactogenic response. There are at least three forms of PRLR; however, only the long form activates the 92-kDa Stat5 protein by inducing phosphorylation at Y694. Once phosphorylated, Stat5 becomes an essential transcription factor which binds to the β-casein gene promoter. The presence of an SH2 domain within Stat5 suggests that it may directly interact with protein tyrosine kinases (PTKs) such as JAK2.
The 47 monoclonal antibody recognizes the phosphorylated Y694 of Stat5a. The homologous phosphorylation site in Stat5b is Y699.
Development References (4)
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Gouilleux F, Wakao H, Mundt M, Groner B. Prolactin induces phosphorylation of Tyr694 of Stat5 (MGF), a prerequisite for DNA binding and induction of transcription. EMBO J. 1994; 13(18):4361-4369. (Biology). View Reference
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Park DS, Lee H, Frank PG, et al. Caveolin-1-deficient mice show accelerated mammary gland development during pregnancy, premature lactation, and hyperactivation of the Jak-2/STAT5a signaling cascade. Mol Biol Cell. 2002; 13(10):3416-3430. (Clone-specific: Western blot). View Reference
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Wakao H, Gouilleux F, Groner B. Mammary gland factor (MGF) is a novel member of the cytokine regulated transcription factor gene family and confers the prolactin response. EMBO J. 1994; 13(9):2182-2191. (Biology). View Reference
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Williams TM, Cheung MW, Park DS, et al. Loss of caveolin-1 gene expression accelerates the development of dysplastic mammary lesions in tumor-prone transgenic mice. Mol Biol Cell. 2003; 14(3):1027-1042. (Clone-specific: Western blot). View Reference
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For Research Use Only. Not for use in diagnostic or therapeutic procedures.