Used in biomedical research to quantify levels of PIAS3 (Protein Inhibitor of Activated STAT3) in cell or tissue samples. Helps investigate signaling pathways involving STAT3, which plays a role in cell growth, immune response, and cancer progression. The kit enables researchers to study regulatory mechanisms in diseases such as tumors, autoimmune disorders, and inflammatory conditions by measuring how PIAS3 modulates STAT3 activity. Commonly applied in molecular biology and immunology studies to assess protein expression changes under experimental treatments.