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Structure of a typical L-alpha-amino acid in the "neutral" form. Amino acids are organic compounds that contain both amino and carboxylic acid functional groups. [1] Although over 500 amino acids exist in nature, by far the most important are the 22 α-amino acids incorporated into proteins. [2]
Glycine (symbol Gly or G; [6] / ˈ ɡ l aɪ s iː n / ⓘ) [7] is an amino acid that has a single hydrogen atom as its side chain. It is the simplest stable amino acid. Glycine is one of the proteinogenic amino acids. It is encoded by all the codons starting with GG (GGU, GGC, GGA, GGG). [8]
Glutamine is the most abundant naturally occurring, nonessential amino acid in the human body, and one of the few amino acids that can directly cross the blood–brain barrier. [8] Humans obtain glutamine through catabolism of proteins in foods they eat. [ 24 ]
Leucine ball and stick model spinning. Leucine (symbol Leu or L) [3] is an essential amino acid that is used in the biosynthesis of proteins.Leucine is an α-amino acid, meaning it contains an α-amino group (which is in the protonated −NH 3 + form under biological conditions), an α-carboxylic acid group (which is in the deprotonated −COO − form under biological conditions), and a side ...
The amino acid composition of collagen is atypical for proteins, particularly with respect to its high hydroxyproline content. The most common motifs in collagen's amino acid sequence are glycine - proline -X and glycine-X-hydroxyproline, where X is any amino acid other than glycine, proline or hydroxyproline.
Phenylalanine ball and stick model spinning. Phenylalanine (symbol Phe or F) [3] is an essential α-amino acid with the formula C 9 H 11 NO 2.It can be viewed as a benzyl group substituted for the methyl group of alanine, or a phenyl group in place of a terminal hydrogen of alanine.
Amino acid 6-17 × 10 −6: 1.3-3.6 × 10 −5: Arsenic: normal range 2-62 × 10 −9: chronic poisoning 100-500 × 10 −9: acute poisoning 600-9300 × 10 −9: Ascorbic acid (Vitamin C) Important vitamin 1-15 × 10 −6: 6-20 × 10 −6: Aspartic acid: Amino acid 0-3 × 10 −6: In WBCs 2.5-4.0 × 10 −4: 9-12 × 10 −6: Bicarbonate: Buffer ...
Arginine is an essential amino acid for birds, as they do not have a urea cycle. [19] For some carnivores, for example cats, dogs [ 20 ] and ferrets, arginine is essential, [ 3 ] because after a meal, their highly efficient protein catabolism produces large quantities of ammonia which need to be processed through the urea cycle, and if not ...