Information about Desmosine

A chemical formula is a concise way of expressing information about the atoms that constitute a particular chemical compound. A chemical formula is also a short way of showing how a chemical reaction occurs.
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Molar mass, symbol M,^[1] is the mass of one mole of a substance (chemical element or chemical compound).^[2] It is a physical property which is characteristic of each pure substance.
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CAS registry numbers are unique numerical identifiers for chemical compounds, polymers, biological sequences, mixtures and alloys. They are also referred to as CAS numbers, CAS RNs or CAS #s.
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PubChem is a database of chemical molecules. The system is maintained by the National Center for Biotechnology Information (NCBI), a component of the National Library of Medicine, which is part of the United States National Institutes of Health (NIH).
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standard state of a material is its state at 1 bar (100 kilopascals exactly). This pressure was changed from 1 atm (101.325 kilopascals) by IUPAC in 1990.^[1] The standard state of a material can be defined at any given temperature, most commonly 25 degrees Celsius,
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Allysine is a derivative of Lysine, used in the production of elastin and collagen. It is produced by the actions of the enzyme lysyl oxidase in the extracellular matrix and is essential in the crosslink formation that stabilizes collagen and elastin.
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side chain in organic chemistry and biochemistry is a part of a molecule that is attached to a core structure. An R group is a generic label for a side chain which can be anything; however, it is typically stable and covalently linked to the adjoining atom.
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Lysine (abbreviated as Lys or K)^[1] is an α-amino acid with the chemical formula HO₂CCH(NH₂)(CH₂)₄NH₂.
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Peptides (from the Greek πεπτίδια, "small digestibles") are short polymers formed from the linking, in a defined order, of α-amino acids.
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Elastin is a protein in connective tissue that is elastic and allows many tissues in the body to resume their shape after stretching or contracting. Elastin helps skin to return to its original position when it is poked or pinched.
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primary structure of a biological molecule is the exact specification of its atomic composition and the chemical bonds connecting those atoms (including stereochemistry). For a typical unbranched, un-crosslinked biopolymer (such as a molecule of DNA, RNA or typical intracellular
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Post-translational modification (PTM) is the chemical modification of a protein after its translation. It is one of the later steps in protein biosynthesis for many proteins. A protein (also called a polypeptide) is a chain of amino acids.
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Protein biosynthesis (synthesis) is the process in which cells build proteins. The term is sometimes used to refer only to protein translation but more often it refers to a multi-step process, beginning with amino acid synthesis and transcription which are then used for translation.
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The N-terminus (also known as the amino-terminus, NH₂-terminus, N-terminal end or amine-terminus) refers to the end of a protein or polypeptide terminated by an amino acid with a free amine group (-NH₂).
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Acetylation (or in IUPAC nomenclature ethanoylation) describes a reaction that introduces an acetyl functional group into an organic compound. Deacetylation is the removal of the acetyl group.
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The C-terminus (also known as the carboxyl-terminus, carboxy-terminus, C-terminal end, or COOH-terminus) of a protein or polypeptide is the end of the amino acid chain terminated by a free carboxyl group (-COOH).
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amide is one of two kinds of compounds:

• the organic functional group characterized by a carbonyl group (C=O) linked to a nitrogen atom (N), or a compound that contains this functional group (pictured to the right); or
• a particular kind of nitrogen anion.

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Lysine (abbreviated as Lys or K)^[1] is an α-amino acid with the chemical formula HO₂CCH(NH₂)(CH₂)₄NH₂.
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Methylation is a term used in the chemical sciences to denote the attachment or substitution of a methyl group on various substrates. This term is commonly used in chemistry, biochemistry, and the biological sciences.
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Cysteine (abbreviated as Cys or C)^[1] is an α-amino acid with the chemical formula HO₂CCH(NH₂)CH₂SH. It is not an essential amino acid, which means that humans can synthesize it. Its codons are UGU and UGC.
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In chemistry, a disulfide bond is a single covalent bond derived from the coupling of thiol groups. The linkage is also called an SS-bond or disulfide bridge. The overall connectivity is therefore C-S-S-C.
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Serine (abbreviated as Ser or S)^[1] is an organic compound with the formula HO₂CCH(NH₂)CH₂OH. It is one of the 20 naturally occurring proteinogenic amino acids. Its codons are UCU, UCC, UCA, UCG, AGU and AGC.
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Threonine (abbreviated as Thr or T)^[1] is an α-amino acid with the chemical formula HO₂CCH(NH₂)CH(OH)CH₃. Its codons are ACU and ACA. This essential amino acid is classified as polar.
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Phosphorylation is the addition of a phosphate (PO₄) group to a protein molecule or a small molecule. Another way to define it would be the introduction of a phosphate group into an organic molecule.
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Tyrosine (abbreviated as Tyr or Y)^[1] or 4-hydroxyphenylalanine, is one of the 20 amino acids that are used by cells to synthesize proteins. It is a non-essential amino acid and it is found in large quantities in casein.
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Phosphorylation is the addition of a phosphate (PO₄) group to a protein molecule or a small molecule. Another way to define it would be the introduction of a phosphate group into an organic molecule.
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For other articles using the abbreviation or acronym asn see ASN.

Asparagine (abbreviated as Asn or N; Asx or B
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Deamidation is a chemical reaction in which an amide functional group is removed from an organic compound. In biochemistry, the reaction is important in the degradation of proteins because it damages the amide-containing side chains of the amino acids asparagine and glutamine.
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Aspartic acid or aspartate (abbreviated as Asp or D; Asx or B represent either aspartic acid or asparagine)^[1] is an α-amino acid with the chemical formula HO₂CCH(NH₂)CH₂CO₂H.
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Deamidation is a chemical reaction in which an amide functional group is removed from an organic compound. In biochemistry, the reaction is important in the degradation of proteins because it damages the amide-containing side chains of the amino acids asparagine and glutamine.
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