Used for the quantitative measurement of Aspartate Aminotransferase (AST) activity in rat biological samples such as serum, plasma, or tissue homogenates. This ELISA kit enables researchers to assess liver function and hepatocellular damage in preclinical studies, particularly in models of drug-induced liver injury, toxicology research, and metabolic disease studies. The assay is useful in monitoring enzyme levels as a biomarker for organ health, offering high sensitivity and specificity for accurate detection of AST changes in experimental rat models.