Abstract
The activity of urea formation of rat's and guinea pig's liver homogenates and that of arginase extracted from their livers were compared in the presence and absence of l-ascorbic acid and the following results were obtained.
1) The activity of urea formation in the liver of rats fed on diets containing various amounts of protein was higher in a high protein diet than in a low protein diet.
2) The activity of urea formation in liver and of arginase extracted from the liver of rat and guinea pig were higher slightly in the presence of l-ascorbic acid than in the absence of it.
