Abstract
Young rats fed on a diet low in either tyrptophan or methionine showed a retardation of growth as well as a decrease in serum protein level. A fall of γ-globulin was found in cases of the low tryptophan diet and that of albumin in those of low methionine diet.
In the liver, a significantly low level of protein was found in tryptophan-deficient rats, whereas a considerable atrophy of the organ was observed in methionine-deficient rats.
Increase of tryptophan content to 0.3g/100g diet could not raise the γ-globulin content over the values in the case of 0.2% trvptophan diet.
