Composition of Free Amino Acid in Excretion of Carap Fed Amino Acid Diets and Casein-gelatin Diets

The amino-acid composition of three mixed diets.

Oxoproline kinetics and oxoproline urinary excretion during glycine- or sulfur amino acid-free diets in humans.

L-5-oxoproline (L-5-OP) is an intermediate in glutathione synthesis, possibly limited by cysteine availability. Urinary 5-OP excretion has been proposed as a measure of glycine availability. We investigated whether 5 days of dietary sulfur amino acid (SAA-free) or glycine (Gly-free) restriction affects plasma kinetics of 5-OP and urinary excretion of L- and D-5-OP in 6 healthy men. On day 6, L-...

Oxygen Consumption Constrains Food Intake in Fish Fed Diets Varying in Essential Amino Acid Composition

Compromisation of food intake when confronted with diets deficient in essential amino acids is a common response of fish and other animals, but the underlying physiological factors are poorly understood. We hypothesize that oxygen consumption of fish is a possible physiological factor constraining food intake. To verify, we assessed the food intake and oxygen consumption of rainbow trout fed to...

Amino acid imbalance on low fibrin diets.

Young growing rats fed on a 9 per cent casein diet containing choline and supplemented with methionine and tryptophsn develop a partial deficiency of threonine which is characterized by the accumulation of fat in the liver (1, 2). The condition was shown to be due to an amino acid imbalance (3). Later, other proteins such as fibrin, egg albumin, and those of beef and pork were studied (4). With...

Whole-body nitrogen and splanchnic amino acid metabolism differ in rats fed mixed diets containing casein or its corresponding amino acid mixture.

Whole-body and splanchnic metabolism of dietary amino acids derived from casein (CAS) or the corresponding crystalline L-amino acid mixture (AA) were compared. Male adult rats were adapted for 9 d to two isoenergetic, isonitrogenous diets (15 g/100 g protein, 5 g/100 g fat) containing either CAS or AA. On d 10, the rats were fed a single mixed meal (3 g dry mass) containing either intrinsically...