Complaint
| L-ARABINOSE Basic information |
| Product Name: | L-ARABINOSE |
| Synonyms: | X-GAL (SOLID POWDER;L-(+)-Arbinose Vetec(TM) reagent grade, >=99%;L-(+)-Arabinose Vetec(TM) reagent grade, >=99%;L-Arabinose Microbiological Grade≥ 99% (HPLC);L-ARA;FEMA 3255;L-ARABINOSE SYRUP 70%;L-ARABINOSE, POWDER |
| CAS: | 5328-37-0 |
| MF: | C5H10O5 |
| MW: | 150.13 |
| EINECS: | 226-214-6 |
| Product Categories: | CarbohydrateMetabolomics;CarbohydratesCarbohydrates;Metabolic Pathways;Metabolites and Cofactors on the Metabolic Pathways Chart;Carbohydrates;Carbohydrates A to;Carbohydrates A-CBiochemicals and Reagents;Core Bioreagents;Metabolic Libraries;Monosaccharide;Carbohydrate Synthesis;Monosaccharides;MonosaccharideSpecialty Synthesis;Specialty Synthesis;CARBOHYDRATE;Arabinose;Basic Sugars (Mono & Oligosaccharides);Biochemistry;Sugars;Carbohydrate LibraryResearch Essentials;Biochemicals and Reagents;BioUltraBiochemicals and Reagents;Food Additives |
| Mol File: | 5328-37-0.mol |
| L-ARABINOSE Chemical Properties |
| Melting point | 160-163 °C(lit.) |
| alpha | 104 º (C=6, IN WATER 23 ºC) |
| Boiling point | 415.5±38.0 °C(Predicted) |
| density | 1.508±0.06 g/cm3(Predicted) |
| FEMA | 3255 | L-ARABINOSE |
| refractive index | 104 ° (C=10, H2O) |
| storage temp. | room temp |
| solubility | H2O: 1 M at 20 °C, clear, colorless |
| form | Solid |
| pka | 12.46±0.20(Predicted) |
| color | White crystalline |
| PH | 6.5-7.0 (100g/l, H2O, 20ºC) |
| Odor | Odorless |
| optical activity | [α]20/D +104.0±2.0°, 24 hr, c = 10% in H2O |
| Water Solubility | almost transparency |
| λmax | λ: 260 nm Amax: ≤0.05 λ: 280 nm Amax: ≤0.04 |
| Merck | 14,761 |
| BRN | 1723085 |
| Stability: | Stable. Incompatible with strong oxidizing agents. |
| InChIKey | PYMYPHUHKUWMLA-VAYJURFESA-N |
| CAS DataBase Reference | 5328-37-0(CAS DataBase Reference) |
| EPA Substance Registry System | L-Arabinose (5328-37-0) |
| Safety Information |
| WGK Germany | 3 |
| F | 3-10 |
| HS Code | 2940 00 00 |
| L-ARABINOSE Usage And Synthesis |
| Chemical Properties | white crystalline powder |
| Chemical Properties | Arabinose is widely distributed in nature including Acacia and Larix species as a complex polysaccharide. |
| Occurrence | For biosynthetic reasons, most saccharides are almost always more abundant in nature as the "D"-form, or structurally analogous to D-glyceraldehyde. 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. L-Arabinose is widely distributed in nature including Acacia and Larix species as a complex polysaccharide. |
| Uses | 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 in E. coli, and it is dynamically activated in the presence of arabinose and the absence of glucose. In synthetic biology, arabinose is often used as a one-way or reversible switch for protein expression under the Pbad promoter in E. coli. This on-switch can be negated by the presence of glucose or reversed off by the addition of glucose in the culture medium which is a form of catabolite repression. L-Arabinose is an arabinose isomer widely found in nature, while D-arabinose is less common. L-Arabinose is a constituent of many biopolymers that make up plant cell walls. This monosaccharide is often used in cell culture media, serving as a bacterial carbon source, and can be used to distinguish between bacteria based on their fermentation abilities. L-Arabinose, in the absence of glucose, induces transcription of the ara operon in E. coli that encodes L-arabinose catabolizing enzymes. It does this by binding to the AraC protein and activating the PBAD promoter. The PBAD promoter is used in plasmid vectors as a switch for protein expression that can be turned on by L-arabinose or turned off by addition of glucose. |
| Definition | l-enantiomers occur naturally. lArabinose is common in vegetable gums, especially arabic. |
| Preparation | By partial hydrolysis of mesquite gum. |
| L-ARABINOSE Preparation Products And Raw materials |
