Useful Info
ESSENTIAL / NONESSENTIL AMINO ACIDS   

 Amino Acids are the chemical units or "building blocks" of the body that make up proteins. Protein substances make up the muscles, tendons, organs, glands, nails, and hair. Growth, repair and maintenance of all cells are dependent upon them. Next to water, protein makes up the greatest portion of our body weight. Amino Acids that must be obtained from the diet are called "Essential Amino Acids" other Amino Acids that the body can manufacture from other sources are called "NonEssential Amino Acids."

Nonessential Essential
Alanine Arginine*
Asparagine Histidine
Aspartate Isoleucine
Cysteine Leucine
Glutamate Lysine
Glutamine Methionine*
Glycine Phenylalanine*
Proline Threonine
Serine Tyrptophan
Tyrosine Valine

*The amino acids arginine, methionine and phenylalanine are considered essential for reasons not directly related to lack of synthesis. Arginine is synthesized by mammalian cells but at a rate that is insufficient to meet the growth needs of the body and the majority that is synthesized is cleaved to form urea. Methionine is required in large amounts to produce cysteine if the latter amino acid is not adequately supplied in the diet. Similarly, phenyalanine is needed in large amounts to form tyrosine if the latter is not adequately supplied in the diet.

source=http://themedicalbiochemistrypage.org/nitrogenmetabolism.html&http://www.realtime.net/anr/aminoacd.html


 

 

Inborn Errors of Metabolism in Infancy: A Guide to Diagnosis   

 

 Fig. 2.

Fig. 1.

SOURCE.http://pediatrics.aappublications.org/content/102/6/e69/F2.expansion.html

Dr Archibald Edward Garrod

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