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A nucleoside consists simply of a nucleobase (also termed a nitrogenous base) and a five-carbon sugar (ribose or 2'-deoxyribose) whereas a nucleotide is composed of a nucleobase, a five-carbon sugar, and one or more phosphate groups. In a nucleoside, the anomeric carbon is linked through a glycosidic bond to the N9 of a purine or the N1 of a ...
This nucleotide contains the five-carbon sugar deoxyribose (at center), a nucleobase called adenine (upper right), and one phosphate group (left). The deoxyribose sugar joined only to the nitrogenous base forms a Deoxyribonucleoside called deoxyadenosine, whereas the whole structure along with the phosphate group is a nucleotide, a constituent of DNA with the name deoxyadenosine monophosphate.
Nucleoside – Any of several glycosylamines comprising a nucleobase and a sugar molecule; Nucleotide – Biological molecules constituting nucleic acids; Nucleic acid notation – Universal notation using the Roman characters A, C, G, and T to call the four DNA nucleotides; Nucleic acid sequence – Succession of nucleotides in a nucleic acid
The substructure consisting of a nucleobase plus sugar is termed a nucleoside. Nucleic acid types differ in the structure of the sugar in their nucleotides–DNA contains 2'-deoxyribose while RNA contains ribose (where the only difference is the presence of a hydroxyl group).
A nucleoside triphosphate is a nucleoside containing a nitrogenous base bound to a 5-carbon sugar (either ribose or deoxyribose), with three phosphate groups bound to the sugar. [1] They are the molecular precursors of both DNA and RNA , which are chains of nucleotides made through the processes of DNA replication and transcription . [ 2 ]
Xeno Nucleoside: analog of the nucleoside, contains the analog of 5-carbon sugar, and a nucleotide base. Xeno Nucleotide: analog of nucleotide, contains the analog of 5-carbon sugar, and a nucleotide base, and one phosphate group consisting of one to three phosphates attaching to the hydroxyl group in the 5-carbon sugar analog.
A nucleoside-modified messenger RNA (modRNA) is a synthetic messenger RNA (mRNA) in which some nucleosides are replaced by other naturally modified nucleosides or by synthetic nucleoside analogues. [ 1 ] modRNA is used to induce the production of a desired protein in certain cells.
The 5'-phosphate group of one nucleotide is linked to the 3'-hydroxyl group of the next nucleotide, creating a backbone of alternating phosphate and pentose residues. There is no phosphodiester bond at each end of the polynucleotide. [5] Phosphodiester bonds are formed between ribonucleotides by the enzyme RNA polymerase.
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