covalent modification

co·va·lent mod·i·fi·ca·tion

alteration in the structure of a macromolecule by enzymatic means, resulting in a change in the properties of that macromolecule; frequently, this type of modification is physiologically relevant.
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The primary endpoint of the study will be the change in plasma levels, at the end of the 24-week treatment period, of o,o'-dityrosine, which is an oxidised covalent modification of protein tyrosine residues that has been shown to be a marker of pulmonary oxidative stress and is markedly elevated in patients with interstitial lung disease.
The covalent modification of substrates is usually obtained by driving a radical electrogenerated [17].
Noncovalent or covalent functionalization are the two ways to modify the surface in which molecules on the surface are deposited by means of van der Walls forces and latter method is based on direct covalent modification of the MWCNT walls with known synthetic approaches 10, 11].
N-terminal pro-atrial natriuretic peptide measurement in plasma suggests covalent modification. Clin Chem 2011;57: 1327-30.
Covalent modification of histone proteins through acetylation and deacetylation affects chromatin structure and regulates gene expression.
Quinone toxicity has been found to involve two primary initiating mechanisms: a) a 1,4-Michael addition reaction leading to covalent modification of cellular targets (Endo et al.
They are based on covalent modification of high-purity, spherical, porous silica particles with a C30 alkyl chain and provide high shape selectivity.
This involves looking at patterns of DNA methylation and covalent modification of histone tails, which Dr.
om the environment; and (ii) screening said exposed libraries utilizing an assay requiring a binding event or the covalent modification of a target, and a fluorescence activated cell sorter to identify positive clones.
Fremont, CA, August 17, 2012 --(PR.com)-- Cellular phosphorylation is a reversible, covalent modification of a protein or lipid that results in the modification of the activity of the phosphorylated molecule by inducing small conformational changes within the molecule.1-2 Catalyzed by protein kinases, phosphate groups can be added via the transfer of the terminal phosphate from a phosphate donor, e.g.
"Nothing is impossible," cyclic AMP was heard to say; "My dear hepatocytes there is no cause for dismay; By simple covalent modification these enzymes can be tamed; They can be made to dance to our tunes or temporarily maimed.
Inactivation and covalent modification with diazo-oxonorvaline.