[Effect of the quality of dietary protein on the degree of its metabolization in the body].

The authors studied the effect of postponed enrichment of low-grade protein (gluten) by the limiting amino acids (lysine and threonine) on the intensity of the cellular protein synthesis and on the PER. It was established that the rate of incorporation of the labeled amino acid 14C-leucine into cellular proteins changes parallel with change in the PER. Low-grade protein nutrition has an adverse effect on the metabolism. If the diet containing low-grade protein is supplemented with amino acids, the intensity of metabolic processes rises almost to the level seen during adequate animal protein nutrition. A direct and statistically significant correlation was found between the biological value of the protein consumed and the intensity of protein biosynthesis in the cells. It is concluded that measurement of the intensity of the cellular protein synthesis in a good biological test for determination of the test protein quality.