Description

STAT3 is an 88 kD member of the STAT (signal transducer and activators of transcription) protein family that is phosphorylated in response to a cytokine receptor-associated kinase activity. Phosphorylation of STAT3 induces nuclear translocation to activate transcription. STAT3 forms both homo- and heterotrimers and is involved in the activation of genes required for cell growth and apoptosis. STAT3 is also involved in gp130 signaling and binds to IL-6 response elements in various acute phase protein promoters. STAT3 is phosphorylated by signaling from IFNs, EGF, FGF, IL-5, HGF, LIF, and BMP2. STAT3 activity is inhibited by PIAS3 and GRIM-19 and can also be regulated by the Rac1 protein.

Formulation

Recommended Usage

Each lot of this antibody is quality control tested by Western blotting. For Western blotting, the suggested use of this reagent is 0.25 - 1.0 µg per ml. For intracellular flow cytometric staining, the suggested use of this reagent is ≤ 0.06 µg per million cells in 100 µl volume. For immunocytochemistry, a concentration range of 1.0 - 5.0 μg/ml is recommended. For immunoprecipitation, the suggested use of this reagent is 2.0 - 10 μg per ml. It is recommended that the reagent be titrated for optimal performance for each application.