The Effect of Dietary Protein Intake on the Xanthine Oxidase Activity of Rat Liver

Abstract

Groups of 10-12 wk.-old rats were fed exptl. diets which contained varying amts. of total protein 25% (stock diet); 20%, as casein; 10%, as soybean oil meal; and 10%, as corn distillers[image], solubles. Xanthine oxidase activity of the liver, estimated by the method of Axelrod and Elvehjem adapted to the Warburg respirometer, was decreased about 50% when the dietary protein was reduced from 25% to 20% and almost lost when the protein was decreased to 10%.