Abstract
The nutritional experiments have been made with the use of partially hydrolyzed products of casein with acid or alkaline proteases.
1) The rats given acid protease-treated casein showed slower growth rate than those given untreated one. On the contrary, it showed better growth in the case of alkaline protease.
2) From the quantitative analyses on the free amino acids, it was shown that casein partially hydrolyzed with alkaline protease contained more essential amino acids such as tryptophan, lysine, arginine, methionine etc. than acid protease treated casein and amino acid composition of untreated casein.
