Effect of dietary glutamic acid on the changes with age in the liver levels of glutamic dehydrogenase, aspartic transaminase, and alanine transaminase of chicks Gallus domesticus)

Abstract

1. 1. Chicks were offered diets containing as nitrogen sources: protein (diet A), crystalline essential amino-acids (diet B), diet B + glutamic acid (C), or diet B + diammonium citrate (D). 2. 2. Liver activities of glutamic dehydrogenase (GDH), aspartic transaminase (Asp T), and alanine transaminase (AIT) were measured at intervals for 29 days. 3. 3. For a given age of chicks given the diet A GDH activity per liver appeared to be controlled, whereas Asp T and AIT activities per g. liver were controlled. 4. 4. Diet C resulted in higher levels of Asp T and A1T and lower levels of GDH compared with diet B. Changing the diet from C to B decreased Asp T and A1T and increased GDH activity.