Alanine aminotransferase is an enzyme involved in protein metabolism and is found in organs and tissues such as the liver, kidney, heart, skeletal muscle, and pancreas. The liver contains the largest amount of alanine aminotransferase, which is mainly found in the plasma of hepatocytes. The main functions of alanine aminotransferase are to participate in human metabolism and to serve as a sensitive indicator of liver damage.1. Participation in metabolism: alanine aminotransferase is mainly responsible for the catalysis of glutamate and alanine, both of which are proteins, and alanine is an intermediate carrier for sugar metabolism in human cells. with alanine aminotransferase With the catalysis of alanine aminotransferase, alanine and glutamate can play a better role, so it is equivalent to alanine aminotransferase indirectly involved in sugar metabolism; 2, liver damage indicators: when various causes of liver damage, alanine aminotransferase in hepatocyte plasma is first released into the blood, causing an increase in the value of alanine aminotransferase in the blood. Alanine aminotransferase is extremely sensitive to liver damage, and damage to a very small number of hepatocytes can cause a dramatic change in the value of alanine aminotransferase in the blood. Therefore, it is used as a sensitive indicator of liver damage. If elevated alanine aminotransferase is found in the blood, the first thing to check is whether there is a problem with the liver.