Used to quantitatively measure Human Arginase 1 levels in biological samples such as serum, plasma, and cell culture supernatants. This assay is widely applied in immunology and cancer research to study immune suppression, as Arg1 is expressed by myeloid-derived suppressor cells (MDSCs) and plays a key role in regulating T-cell function by depleting L-arginine. It is also used in liver disease studies, given Arg1's role in the urea cycle, helping assess liver function and hepatocyte damage. The kit supports biomarker validation and therapeutic monitoring in preclinical and clinical investigations.