Fate of amino acids

Amino acid Adults Child (1-3 y) Child (4-13 y) Infant (7-12 months) 

In adults, data are also presented in parentheses these are reassessments of the requirements by Young Borgonha (2000). 

A problem with tyrosine and cysteine is that they can be synthesised from other amino acids, phenylalanine and methionine, respectively. Since both phenylalanine and methionine are indispensable amino acids, if they are not present in the diet at or below minimal requirement, then there is not sufficient to synthesise tyrosine or cysteine and, therefore, these amino acids become indispensable, i.e. conditionally essential. 

There are three major fates of amino acids  

1 Taurine bile, brain, cats, heart, milk, sharks, shrimps and skeletal and cardiac muscle 

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The major metabolic fate of amino acids is conversion into organic acids absent an enzyme to oxidize an organic acid, an organic aciduria results 668... 

The major metabolic fate of amino acids is conversion into organic acids absent an enzyme to oxidize an organic acid, an organic aciduria results. Three features characterize the metabolism of essentially all amino acids (1) incorporation into protein (2) conversion into messenger compounds such as hormones and neurotransmitters ... 

A discussion of the various fates of amino acids in plants. 

As stated at the outset of this chapter, the primary fate of amino acids is their incorporation into protein. However, amino acids also serve as precursors for a number of other important molecules. These include processes leading to the formation of the porphyrin nucleus found in many oxygen-and electron-carrying proteins, of biologically active amines, and of glutathione. These two topics are examined below. 

Hidaka, H., Horikoshi, S., Ajisaka, K., Zhao, J., and Serpone, N. (1997). Fate of amino acids upon exposure to aqueous titania irradiation with UV-A and UV-B radiation. Photocatalyzed formation of NH3, NO3", and CO2.J. Photochem. Photobiol. A Chem. 108, 197—205. 

Removal of a-Amino Groups Transamination Removal of a-Amino Groups Oxidative Deamination The Fate of Amino Acid Carbon Skeletons... 

Fate of Amino Acid Nitrogen Urea Cycle... 

Fig 38.1. Fate of amino acid carbons and nitrogen. Amino acid carbon can be used either for energy storage (glycogen, fatty acids) or for energy. Amino acid nitrogen is used for urea synthesis. One nitrogen of urea comes from NH4, the other from aspartate. 

CHAPTER 38 / FATE OF AMINO ACID NITROGEN UREA CYCLE... 

An automatic method of amino acid analysis has been applied to many brewing problems and, in particular, much data have been accumulated on the fate of amino acids during wort boiling in a commercial brewery [16]. Under these conditions there was no increase in the amount of threonine and valine in the wort after hop boiling but similar losses of the basic amino acids were observed. 

Finot, P.A., Magnenot, E., Mottu, F. and Bujard, E. (1978) Biological availability and metabolic fate of amino acids modified by technological processing. Ann. Nutr. Alim. 32, 325. 

Gluconeogenesis is an important fate of amino acid carbon skeletons in the fasting state, when the metabolic imperative is to maintain a supply of glucose for the central nervous system and red blood cells. However, in the fed state the carbon skeletons of... 

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