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Trisaccharides are oligosaccharides composed of three monosaccharides with two glycosidic bonds connecting them. Similar to the disaccharides, each glycosidic bond can be formed between any hydroxyl group on the component monosaccharides. Even if all three component sugars are the same (e.g., glucose), different bond combinations (regiochemistry) and stereochemistry (alpha- or beta-) result in triaccharides that are diastereoisomers with different chemical and physical properties.
Examples
| Trisaccharide | Unit 1 | Bond | Unit 2 | Bond | Unit 3 |
| Nigerotriose | glucose | α(1→3) | glucose | α(1→3) | glucose |
| Maltotriose | glucose | α(1→4) | glucose | α(1→4) | glucose |
| Melezitose | glucose | α(1→2) | fructose | α(1→3) | glucose |
| Maltotriulose | glucose | α(1→4) | glucose | α(1→4) | fructose |
| Raffinose | galactose | α(1→6) | glucose | β(1→2) | fructose |
| Kestose | glucose | α(1→2) | fructose | β(1→2) | fructose |
See also
External links
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Wikipedia content modification information:
- This page was last modified on 21 November 2008, at 17:11.
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