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The incorporation of these nonstandard amino acids is rare. For example, 25 human proteins include selenocysteine in their primary structure, [64] and the structurally characterized enzymes (selenoenzymes) employ selenocysteine as the catalytic moiety in their active sites. [65] Pyrrolysine and selenocysteine are encoded via variant codons.
Amino acid; Amylase (also see α-amylase) Anabolic steroid; Anandamide (ANA) Androgen; Anethole; Angiotensinogen; Anisomycin; Antidiuretic hormone (ADH) Anti-Müllerian hormone (AMH) Arabinose; Arginine; Argonaute; Ascomycin; Ascorbic acid ; Asparagine; Aspartic acid; Asymmetric dimethylarginine; ATP synthase; Atrial-natriuretic peptide (ANP ...
(In biochemistry, the term amino acid is used when referring to those amino acids in which the amino and carboxylate functionalities are attached to the same carbon, plus proline which is not actually an amino acid). Modified amino acids are sometimes observed in proteins; this is usually the result of enzymatic modification after translation ...
Protein sequence is typically notated as a string of letters, listing the amino acids starting at the amino-terminal end through to the carboxyl-terminal end. Either a three letter code or single letter code can be used to represent the 22 naturally encoded amino acids, as well as mixtures or ambiguous amino acids (similar to nucleic acid ...
The commercial production of amino acids usually relies on mutant bacteria that overproduce individual amino acids using glucose as a carbon source. Some amino acids are produced by enzymatic conversions of synthetic intermediates. 2-Aminothiazoline-4-carboxylic acid is an intermediate in the industrial synthesis of L-cysteine for example.
Each protein has its own unique amino acid sequence that is specified by the nucleotide sequence of the gene encoding this protein. The genetic code is a set of three-nucleotide sets called codons and each three-nucleotide combination designates an amino acid, for example AUG (adenine–uracil–guanine) is the code for methionine.
Amino acids are listed by type: Proteinogenic amino acid; Non-proteinogenic amino acids This page was last edited on 5 January 2020, at 17:16 (UTC). Text is ...