since glutamine may play an important role in the formation of uric acid for chickens , the reduced amount of free glutamine and glutamic acid in the liver of cocks fed the diet suplemented with methionine plus arginine might account for the reduced excretion of uric acid , and therefore for the nitrogen sparing action of methionine plus arginine in chickens fed a protein-free diet .
C0017797
glutamine
C0061472
glutamic acid