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Lysine. Technically, any organic compound with an amine (–NH 2) and a carboxylic acid (–COOH) functional group is an amino acid. The proteinogenic amino acids are a small subset of this group that possess a central carbon atom (α- or 2-) bearing an amino group, a carboxyl group, a side chain and an α-hydrogen levo conformation, with the exception of glycine, which is achiral, and proline ...
The 20 amino acids that are encoded directly by the codons of the universal genetic code are called standard or canonical amino acids. A modified form of methionine ( N -formylmethionine ) is often incorporated in place of methionine as the initial amino acid of proteins in bacteria, mitochondria and plastids (including chloroplasts).
The distinction between essential and non-essential amino acids is somewhat unclear, as some amino acids can be produced from others. The sulfur-containing amino acids, methionine and homocysteine, can be converted into each other but neither can be synthesized de novo in humans. Likewise, cysteine can be made from homocysteine but cannot be ...
Pages in category "Non-proteinogenic amino acids" The following 42 pages are in this category, out of 42 total. This list may not reflect recent changes. ...
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An alloprotein is a novel synthetic protein containing one or more "non-natural" amino acids.Non-natural in the context means an amino acid either not occurring in nature (novel and synthesised amino acids), [1] or occurring in nature but not naturally occurring within proteins (natural but non-proteinogenic amino acids).
Amino acids are listed by type: Proteinogenic amino acid; Non-proteinogenic amino acids This page was last edited on 5 ...
Glutamine ball and stick model spinning. Glutamine (symbol Gln or Q) [3] is an α-amino acid that is used in the biosynthesis of proteins.Its side chain is similar to that of glutamic acid, except the carboxylic acid group is replaced by an amide.