|CAS number||, (D) , (L)|
|Jmol-3D images||Image 1
|Molar mass||150.13 g mol−1|
|Appearance||Colorless crystals as prisms or needles|
|Density||1.585 g/cm3 (20 ºC)|
|Melting point||164 to 165 °C (327 to 329 °F; 437 to 438 K)|
|Solubility in water||Soluble|
|Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)|
|(what is: / ?)|
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, also known as the araBAD operon, has been the subject of much biomolecular research. The operon directs the catabolism of arabinose E. coli, and it is dynamically activated in the presence of arabinose and the absence of glucose.
- For sugars, the D/L nomenclature does not refer to the molecule's optical rotation properties but to its structural analogy to glyceraldehyde.