A compound of a sugar (usually ribose or deoxyribose) with a purine or pyrimidine base by way of an N-glycosyl link.
- n. bisphosphate a n. that carries two independent ( i.e., not linked to each other) phosphoric residues. Cf.:n. diphosphate.
- n. diphosphate (NDP) the pyrophosphoric ester of a n., i.e., a n. in which the H of one of the ribose hydroxyls (usually the 5′) is replaced by a pyrophosphoric (diphosphoric) radical; e.g., adenosine 5′-diphosphate. Cf.:n. bisphosphate.
- n. monophosphate a nucleotide containing only one phosphoryl group, e.g., AMP.
- n. triphosphate a n. in which the H of one of the ribose hydroxyls (usually the 5′) is replaced by a triphosphoric group, –PO(OH)–O–PO(OH)–O–PO(OH)2 or the corresponding conjugate base; e.g., adenosine triphosphate.

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nu·cle·o·side 'n(y)ü-klē-ə-.sīd n a compound (as guanosine or adenosine) that consists of a purine or pyrimidine base combined with deoxyribose or ribose and is found esp. in DNA or RNA compare NUCLEOTIDE

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a compound consisting of a nitrogen-containing base (a purine or pyrimidine) linked to a sugar. Examples are adenosine, guanosine, cytidine, thymidine, and uracil.

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nu·cleo·side (nooґkle-o-sīd″) a heterocyclic nitrogenous base, particularly a purine or pyrimidine, in N-glycosidic linkage with a sugar, particularly a pentose; it is often used specifically to denote a compound obtained by hydrolysis of nucleic acids, a purine or pyrimidine linked to ribose or deoxyribose, e.g., adenosine or cytidine.

Medical dictionary. 2011.

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  • nucléoside — [ nykleozid ] n. m. • 1907; de nuclé(o) et oside ♦ Biochim. Produit de décomposition partielle d un nucléide, constitué par du ribose ou du désoxyribose et une base purique ou pyrimidique. ● nucléoside nom masculin Composé formé par l union… …   Encyclopédie Universelle

  • Nucleoside — Nucléoside Les nucléosides sont des glycosylamines faites par le rattachement d une nucléobase à un cycle ribose. Dans les cellules, les nucléosides peuvent être phosphorylés par des kinases spécifiques, ce qui produit des nucléotides, les… …   Wikipédia en Français

  • nucleoside — ucleoside n. (Biochem.) A type of molecule found in all living organisms, present mostly in chemically combined form as a component of nucleic acids, and also in smaller amounts in free form, consisting of a pentose sugar bound to a purine or… …   The Collaborative International Dictionary of English

  • nucleoside — nucleoside. См. нуклеозид. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • Nucleoside — Nucleoside, Verbindungen einer Purin oder Pyrimidinbase mit einer Pentose (Ribose oder Desoxyribose); Bestandteile der ⇒ Nucleotide. N. sind z.B. Adenosin, Cytidin, Uridin, Thymidin, Guanosin. Die N. sind N glykosidische Verbindungen, d.h. ein N… …   Deutsch wörterbuch der biologie

  • nucleoside — [no͞o′klē ō sīd΄, nyo͞o′klē ō sīd΄] n. [< NUCLEO + OSE2 + IDE] any of various compounds consisting of a purine or pyrimidine base linked to a carbohydrate: a major component of a nucleotide …   English World dictionary

  • Nucleoside — Nitrogenous base Nucleoside Deoxynucleoside Adenine Adenosine A …   Wikipedia

  • Nucleoside — Die Artikel Nukleotid und Nukleoside überschneiden sich thematisch. Hilf mit, die Artikel besser voneinander abzugrenzen oder zu vereinigen. Beteilige dich dazu an der Diskussion über diese Überschneidungen. Bitte entferne diesen Baustein erst… …   Deutsch Wikipedia

  • Nucléoside —  Ne doit pas être confondu avec nucléotide. Les nucléosides sont des glycosylamines constitués d une nucléobase (ou base) liée à un ribose ou un désoxyribose via une liaison glycosidique. Parmi les nucléosides, on retrouve par exemple la… …   Wikipédia en Français

  • nucleoside — A base (purine or pyrimidine) that is covalently linked to a 5 carbon (pentose) sugar. When the sugar is ribose, the nucleoside is a ribonucleoside; when it is 2 deoxyribose, the nucleoside is a deoxyribonucleoside. See: nucleotide …   Glossary of Biotechnology

  • nucleoside — nu·cle·o·sì·de s.m. TS biochim. composto organico presente nelle nucleoproteine derivante dalla scissione di un nucleotide, formato da uno zucchero, spec. pentoso o esoso, e legato a un composto basico azotato {{line}} {{/line}} DATA: 1933. ETIMO …   Dizionario italiano

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