Used for the quantitative measurement of N-acetyl-β-D-glucosaminidase (NAG) activity in biological samples such as urine, serum, and tissue homogenates from rats. This ELISA kit is particularly useful in nephrotoxicity studies, as elevated NAG levels are a sensitive indicator of renal tubular damage. It enables researchers to assess kidney function and monitor the effects of drugs, toxins, or disease conditions on renal health in preclinical research. The assay is widely applied in pharmaceutical development, toxicology testing, and metabolic disease studies involving rat models.