arabinose
American Heritage Dictionary:
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a·rab·i·nose
(ə-răb'ə-nōs', ăr'ə-bə-) 
n.
A crystalline pentose sugar, C5H10O5, obtained from plant polysaccharides such as gums and hemicelluloses.
n.
A crystalline pentose sugar, C5H10O5, obtained from plant polysaccharides such as gums and hemicelluloses.
[(GUM) ARAB(IC) + -IN + -OSE2.]
Oxford Dictionary of Biochemistry:
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arabinose
arabino-pentose; a monosaccharide. l-Arabinose occurs free, e.g. in the heartwood of many conifers, and in the combined state, in both furanose and pyranose forms, as a constituent of various plant hemicelluloses, bacterial polysaccharides, etc. d-Arabinose occurs to some extent in plant glycosides and is a constituent of the arabinonucleosides
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| arabinonucleoside, arabinogalactan proteins, arabinogalactan | |
| arabinose-5-phosphate isomerase, arabinoside, arabinoxylan |
Wikipedia on Answers.com:
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Arabinose
| Arabinose | |
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Arabinose |
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Other names
Pectinose |
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| Identifiers | |
| CAS number | 147-81-9  , 10323-20-3 (D) , 5328-37-0 (L) |
| PubChem | 5460291 |
| ChemSpider | 59687 |
| EC-number | 205-699-8 |
| ChEBI | CHEBI:46983 |
| Jmol-3D images | Image 1 Image 2 |
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SMILES
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| Properties[1] | |
| Molecular formula | C5H10O5 |
| Molar mass | 150.13 g mol−1 |
| Appearance | Colorless crystals as prisms or needles |
| Density | 1.585 g/cm3 (20 ºC) |
| Melting point |
164-165 °C, 437-438 K, 327-329 °F |
| Solubility in water | Soluble |
| Related compounds | |
| Related aldopentoses | Ribose Xylose Lyxose |
 (verify) (what is:  / ?)Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
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| Infobox references | |
Arabinose is an aldopentose – a monosaccharide containing five carbon atoms, and including an aldehyde (CHO) functional group.
For biosynthetic reasons, most saccharides are almost always more abundant in nature as the "D"-form, or structurally analogous to D-glyceraldehyde.[note 1] However, L-arabinose is in fact more common than D-arabinose in nature and is found in nature as a component of biopolymers such as hemicellulose and pectin. The L-arabinose operon is a very important operon in molecular biology and bioengineering.
A classic method for the organic synthesis of arabinose from glucose is the Wohl degradation.[2]
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D-Arabinose 
α-D-Arabinofuranose
β-D-Arabinofuranose
α-D-Arabinopyranose
β-D-Arabinopyranose
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Contents
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Etymology
Arabinose gets its name from gum arabic, from which it was first isolated.[3]
Use
Arabinose is used as a culture medium for certain bacteria.
Notes
- ^ For sugars, the D/L nomenclature does not refer to the molecule's optical rotation properties but to its structural analogy to glyceraldehyde.
References
- ^ Weast, Robert C., ed (1981). CRC Handbook of Chemistry and Physics (62nd ed.). Boca Raton, FL: CRC Press. p. C-110. ISBN 0-8493-0462-8.
- ^ Braun, Géza (1940), "D-Arabinose", Org. Synth. 20: 14, http://www.orgsyn.org/orgsyn/orgsyn/prepContent.asp?prep=CV3P0101; Coll. Vol. 3: 101
- ^ Merriam Webster Dictionary
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American Heritage Dictionary
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
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Oxford Dictionary of Biochemistry
Oxford University Press. Oxford Dictionary of Biochemistry and Molecular Biology © 1997, 2000, 2006 All rights reserved.
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