Effects of a Lysine Deficiency Upon Enzyme Activity in Rat Liver.

Abstract
A lysine-free ration fed to weanling rats either ad libitum or by a forcible feeding procedure reduces activity of liver xanthine oxidase, succinic oxidase, and choline oxidase to somewhat over half that of normal. A lysine deficiency has little effect on liver endogenous respiration. The deficiency produces an entirely different pattern of liver enzyme activity from that produced by a methionine or histidine deficiency.