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Tyrosine requirement of healthy men receiving a fixed phenylalanine intake determined by using indicator amino acid oxidation
stable isotopes adult amino acid requirements Amino acid metabolism
2016/6/12
The currently accepted total aromatic amino acid
requirement for adults is based on nitrogen balance measurements
in individuals who received their intake of aromatic amino
acids solely as phenylal...
Phenylketonuria: tyrosine supplementation in phenylalanine-restricted diets
Phenylketonuria PKU tyrosine
2016/6/12
Treatment of phenylketonuria (PKU) consists
of restriction of natural protein and provision of a protein substitute
that lacks phenylalanine but is enriched in tyrosine. Large
and unexplained diffe...
Effects of normal meals rich in carbohydrates or proteins on plasma tryptophan and tyrosine ratios
Tryptophan serotonin tyrosine, dopamine
2016/12/27
The delivery of circulating tryptophan to the brain and its conversion to serotonin vary directly with plasma concentrations of tryptophan and inversely with those of other large neutral amino acids (...
Endogenous glycine and tyrosine production is maintained in adults consuming a marginal-protein diet
Phenylalanine glycine tyrosine kinetics marginal protein intake nitrogen balance protein requirements dispensable amino acids
2016/12/17
Background: The adequacy of indispensable amino acid supplies has received much attention in studies of protein requirements, but the availability of nitrogen for synthesis and maintenance of the...