Used in research settings to detect and quantify N-acetyl-β-D-glucosaminidase (NAG) enzyme levels in chicken samples, particularly in urine, serum, or tissue homogenates. This ELISA kit helps assess kidney function and proximal tubular damage, as NAG is a biomarker for renal injury. It is commonly applied in veterinary research, poultry health studies, and toxicology to monitor early signs of nephrotoxicity or disease-related kidney stress in chickens. The assay provides a sensitive and specific colorimetric measurement, enabling high-throughput analysis in experimental and diagnostic investigations.