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Valine (symbol Val or V) [4] is an α-amino acid that is used in the biosynthesis of proteins. 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 chain isopropyl group, making it a non-polar aliphatic amino acid.
The compound is a structural analog of valeric acid and also an isomer of the more common amino acid valine. [2] Like most other α-amino acids , norvaline is chiral . It is a white, water-soluble solid.
Hypervalinemia is a rare autosomal recessive metabolic disorder in which urinary and serum levels of the branched-chain amino acid valine are elevated, without related elevation of the branched-chain amino acids leucine and isoleucine. [2] [3] It is caused by a deficiency of the enzyme valine transaminase. [4]
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 chain isobutyl group, making it a non ...
Of the 21 amino acids common to all life forms, the nine amino acids humans cannot synthesize are valine, isoleucine, leucine, methionine, phenylalanine, tryptophan, threonine, histidine, and lysine. [ 1 ] [ 2 ]
Valbenazine is a prodrug which is an ester of [+]-α-dihydrotetrabenazine (DTBZ) with the amino acid L-valine. It is extensively hydrolyzed to the active metabolite DTBZ. Plasma protein binding of valbenazine is over 99%, and that of DTBZ is about 64%. The biological half-life of both valbenazine and DTBZ is 15 to 22 hours.
Essential for humans, phenylalanine, tyrosine, and tryptophan contain a large, rigid aromatic group on the side chain. These are the biggest amino acids. Like isoleucine, leucine, and valine, these are hydrophobic and tend to orient towards the interior of the folded protein molecule. Phenylalanine can be converted into tyrosine. Glycine: G Gly
Valinomycin is a dodecadepsipeptide, that is, it is made of twelve alternating amino acids and esters to form a macrocyclic molecule. The twelve carbonyl groups are essential for the binding of metal ions, and also for solvation in polar solvents.
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