Transaminases are a common and important measure of liver function. The liver cells are the primary site of aminotransferases. When hepatocytes are damaged by inflammatory and toxic necrosis, transaminases are released into the bloodstream, causing an increase in serum transaminases. The normal reference values for aminotransferases are as follows. The normal value for glutamic oxalacetic aminotransferase is 0-37 units per liter, while the normal value for glutamic alanine aminotransferase is 0-40 units per liter, so the normal ratio of glutamic alanine aminotransferase to glutamic oxalacetic aminotransferase is 1.5 to 2.5.