Abstract
Ribonuclease activity of liver and serum of rat (body weight 100-160 grams, Donryu strain or Sprague Dawley strain) fed diet ad libitum or with pair-feeding for 9-22 days with higher levels of casein showed some higher values, but no difference in the activities per nitrogen of liver or serum protein.
Ribonuclease activity of liver and serum of rat (body weight 60 grams, Donryu strain) fed for 21day ad libitum 8% amino acid diet with different levels of methionine showed some higher tendency depending on methionine levels in the diet fed, but also no difference in the activities per nitrogen of liver or serum protein.
Liver xanthine oxidase activities of rats were increased depending on casein levels (by 20%) in the diet fed, but no difference was shown depending on methionine levels in 8% amino acid diet fed.
