Used in biomedical research to quantify levels of Guanylate Dissociation Inhibitor (GDI) in human biological samples such as serum, plasma, and cell lysates. This ELISA kit enables researchers to study the role of GDI in cellular processes involving Rho GTPases, which regulate cytoskeletal dynamics, cell signaling, and membrane trafficking. It is commonly applied in studies related to neurological disorders, cancer progression, and immune system regulation where GDI expression or function may be altered. The assay provides a sensitive and specific method for monitoring changes in GDI concentration across experimental conditions, supporting both basic research and biomarker validation efforts.