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Sugars nucleic acids

The kinetics and mechanisms of the oxidation of DNA, nucleic acid sugars, and nucleotides by [Ru(0)(tpy)(bpy)] and its derivatives have been reported. " The Ru =0 species is an efficient DNA cleavage agent it cleaves DNA by sugar oxidation at the 1 position, which is indicated by the termini formed with and without piperidine treatment and by the production of free bases and 5-methylene-2(5//)-furanone. Kinetic studies show that the I -C— activation is rate determining and a hydride transfer mechanism is proposed. The Ru =0 species also oxidizes guanine bases via an 0x0 transfer mechanism to produce piperidine-labile cleavages. [Pg.827]

An important class of naturally occurring anions are the nucleoside phosphates (i.e. nucleotides) present in nucleic acids, sugar nucleotides for glycosylation of oligosaccharides or proteins, activated forms of proteins and chemical mediators which play a central role in intracellular signals. Artificial phosphate receptors allow for detection and separation of biologically important compounds. However, most chemical receptors are soluble in solution and cannot be therefore separated easily from the solution binding the desired compound. [Pg.88]

Phagocytosis is a process by which foreign or old autologous proteins are ingested by the cell and then removed by fusion with lysosomes these structures are vesicles containing hydrolytic enzymes. Lysosomes (Figure 1.5) are membrane-bound vesicles that are used to break down proteins, nucleic acids, sugar polymers, and other materials that are either extracellular or... [Pg.13]

PURPOSE AND RATIONALE During the last 10 years many uptake transporters as well as efflux transporters have been discovered in the GI and especially in the small intestine. They allow uptake of ions, amino acids, peptides, nucleic acids, sugars, organic acids, vitamins, cofactors and nucleosides. On the other hand, efflux transporters ensure protection of the organism from unwanted pathogen or compound delivery. Subsequently, cellular systems have been used to study uptake in mechanistic studies in more detail. Additionally inhibition studies provide hints on potential drag-drug interactions. [Pg.453]

The manifest evolutionary advantages of /3-D-ribose over other potential nucleic acid sugar building blocks have been related to its unique stereochemical features in a review <2006MI189>. [Pg.395]

Water soluble Proteins, nucleic acids sugars Ethanol/Aqueous salt Acetonitrile/Aqueous salt... [Pg.1950]

Certain small molecules (monomers) in the cellular soup can be joined to form polymers through repetition of a single type of chemical-linkage reaction (see Figure 2-11). Cells produce three types of large polymers, commonly called macromolecules polysaccharides, proteins, and nucleic acids. Sugars, for example, are the monomers used to form... [Pg.9]

MNM can also be applied to other biomolecules such as nucleic acids, sugars, and lipids. MNM should be particularly powerful for mixed systems, e.g., protein-nucleic acid complexes or protein-lipid complexes, for which the blocks for nonprotein components can be chosen according to chemical intuition, e.g., each nucleotide in DNA is a block. [Pg.242]

The next phase in this evolutionary sequence involved the natural combination of these reactive elements to produce a bewildering array of simple molecular combinations derived from these coreshell atomic spheroids (i.e., NH3, CH4, urea, etc.) followed by the formation of more complex, but yet small molecules that included o -amino acids, nucleic acids, sugars, hydrocarbons, etc. Combinations and permutations of specific CADPs at the atomic level articulated molecular level architectures and... [Pg.193]

No discussion has appeared in the literature about carbon demethylation (C-demethylation) as plants degrade alkaloids. This subject seems to have some interest, since certain amino acids, nucleic acids, sugars, lignin, etc., may be formed before the alkaloid is metabolized completely to CO2. [Pg.199]

Biological Applications Antimalarial agents diagnosis of diseases related to amyloid accumulation diagnostic assays detecting fiingi nucleic acids sugars ... [Pg.249]

Estimated values of 0.54, 0.61 and 1.02 cm -g are representative of the nucleic acid, carbohydrate and lipid moieties of nucleo-, glyco- and lipoproteins, respectively (cf. Table 5). These values also correspond to experimental volumes commonly found for simple nucleic acids, sugars or polysaccharides, and lipids, respectively, in dilute salt or buffer solutions (cf. [86D1]). [Pg.144]


See other pages where Sugars nucleic acids is mentioned: [Pg.457]    [Pg.51]    [Pg.615]    [Pg.2]    [Pg.186]    [Pg.61]    [Pg.204]    [Pg.4]    [Pg.247]    [Pg.264]    [Pg.3]    [Pg.171]    [Pg.182]    [Pg.21]    [Pg.41]    [Pg.135]    [Pg.621]    [Pg.369]    [Pg.90]    [Pg.134]    [Pg.1196]    [Pg.333]    [Pg.156]   
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