Alanine Aminotransferase Activity

The catalytic activity of the enzyme alanine aminotransferase (ALT) measured in a blood sample and reported as activity per unit volume (e.g., U/L) under specified assay conditions; in many species elevated plasma/serum ALT activity indicates hepatocellular membrane leakage or increased hepatocellular turnover but interpretation requires species-specific context and correlation with clinical and o