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L-alanine is second only to L-leucine in rate of occurrence, accounting for 7.8% of the primary structure in a sample of 1,150 proteins. [5] The right-handed form, D -alanine, occurs in peptides in some bacterial cell walls [ 6 ] : 131 (in peptidoglycan ) and in some peptide antibiotics , and occurs in the tissues of many crustaceans and ...
^a EINECS for L-alanine ^a CID 602 from PubChem ^a CID 5950 from PubChem This page was last edited on 12 April 2023, at 11:37 (UTC). Text is available ...
Cysteic acid also known as 3-sulfo-l-alanine is the organic compound with the formula HO 3 SCH 2 CH(NH 2)CO 2 H. It is often referred to as cysteate, which near neutral pH takes the form − O 3 SCH 2 CH(NH 3 +)CO 2 −. It is an amino acid generated by oxidation of cysteine, whereby a thiol group is fully oxidized to a sulfonic acid/sulfonate ...
L-aspartate L-alanine + CO 2. Hence, this enzyme has one substrate, L-aspartate, and two products, L-alanine and CO 2. This reaction is the basis of the industrial synthesis of L-alanine. [1] This enzyme belongs to the family of lyases, specifically the carboxy-lyases, which cleave carbon-carbon bonds.
An obvious synthesis route to α-alaninediacetic acid is from racemic α-DL-alanine, which provides racemic α-ADA by double cyanomethylation with methanal and hydrogen cyanide, hydrolysis of the intermediately formed diacetonitrile to the trisodium salt and subsequent acidification with mineral acids in a 97.4% overall yield. [4]
In enzymology, an aminolevulinate transaminase (EC 2.6.1.43) is an enzyme that catalyzes the chemical reaction. 5-aminolevulinate + pyruvate 4,5-dioxopentanoate + L-alanine. Thus, the two substrates of this enzyme are 5-aminolevulinate and pyruvate, whereas its two products are 4,5-dioxopentanoate and L-alanine.
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