[Amino acid metabolic indices in newborn rats].

In simulated tests on rats of the 1st months of life set up for the purpose of educing causes accounting for a highly effective utilization of the milk proteins in the early post-natal perions subject to study were the amino acids metabolism rates. An investigation of the enzymes activity showed that a falling of the milk proteins utilization effectiveness proceeds against the background of an intensive inclusion of the catabolic route of the amino acids metabolism in the liver. The urea content in the urine correlated with a gradual inclusion of the enzymatic liver systems partaking in the urine formation. The amino acids metabolism with a ramified chain in the liver tissue of rats of the first days of life was found to stand low to a still greater degree than this was the case in adult animals. One of the causes responsible for a highly effective utilization of the milk proteins in the perinatal period may be due to an incomplete functioning of the catabolic route of the amino acids metabolism in the liver.