This enzyme is found in the salivary glands and exocrine pancreas, and tissue specific isoenzymes can be distinguished by means of dectrophoresis or the use of
inhibitors. Plasma amylase activity is usually increased, often to 5 x or even to more than 10 x ULN, in acute pancreatitis. Its use in the diagnosis of patients presenting with an acute abdomen, and the other causes of an increase in
plasma amylase activity.
Marshall WJ.Clinical chemistry. PLASMA PROTEINS AND ENZYMES. 5th ed. Mosby.Elsevier limited. 2004;13:252.