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In [[biology]], '''nucleosides''' are "[[purine]] or [[pyrimidine]] bases attached to a ribose or deoxyribose."<ref>{{MeSH}}</ref> | In [[biology]], '''nucleosides''' are "[[purine]] or [[pyrimidine]] bases attached to a ribose or deoxyribose."<ref>{{MeSH}}</ref> | ||
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==References== | ==References== | ||
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Latest revision as of 11:00, 27 September 2024
In biology, nucleosides are "purine or pyrimidine bases attached to a ribose or deoxyribose."[1]
| Nucleobase | Ribonucleoside (RNA) |
Deoxynucleoside (DNA) |
|---|---|---|
| Purine nucleobases | ||
| Adenine |
Adenosine A |
Deoxyadenosine dA |
| Guanine |
Guanosine G |
Deoxyguanosine dG |
| Pyrimidine nucleobases | ||
| Thymine |
5'-Methyluridine m5U (not present in RNA) |
Thymidine dT |
| Uracil |
Uridine U |
Deoxyuridine dU (not present in DNA) |
| Cytosine |
Cytidine C |
Deoxycytidine dC |
Purine or pyrimidine bases (nucleobases) attached to ribose are called ribonucleosides.
Purine or pyrimidine bases (nucleobases) attached to deoxyribose are called deoxynucleosides.
A nucleotide is a nucleoside (a purine or pyrimidine base plus a pentose sugar) with a phosphate group added.
References
- ↑ Anonymous (2024), Nucleoside (English). Medical Subject Headings. U.S. National Library of Medicine.