Abstract
The growth of young rats fed the diet containing 0.1% of tryptophan was superior to that of rats fed 0.08% tryptophan diet. HoWever, in spite of the normal growth, the blood γ-globulin level of the former was as low as that of rats fed 0.08% tryptophan diet.
It is suggested that the 0.1% tryptophan diet is sufficient for the normal growth of young rats, but isinsufficient for the formation of blood γ-globulin.
The blood γ-globulin level of rats fed the low methionine diet did not fall, in contrast with the case of low tryptophan diet.
