FD250S
Isothiocyanate-dextrane marqué à la fluorescence
average mol wt 250,000
Synonyme(s) :
FITC-dextrane
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About This Item
Produits recommandés
Source biologique
bacterial (Leuconostoc mesenteroides)
Conjugué
FITC conjugate
Forme
powder
Poids mol.
average mol wt 250,000
Ampleur du marquage
0.003-0.020 mol FITC per mol glucose
Couleur
yellow to orange
Solubilité
water: 25 mg/mL, clear, yellow
Température de stockage
2-8°C
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Catégories apparentées
Description générale
Dextran is a polymer of anhydroglucose. It is composed of approximately 95% alpha-D-(166) linkages. The remaining (163) linkages account for the branching of dextran. Conflicting data on the branch lengths implies that the average branch length is less than three glucose units. However, other methods indicate branches of greater than 50 glucose units exist. Native dextran has been found to have a molecular weight (MW) in the range of 9 million to 500 million. Lower MW dextrans will exhibit slightly less branching and have a more narrow range of MW distribution. Dextrans with MW greater than 10,000 behave as if they are highly branched. As the MW increases, dextran molecules attain greater symmetry. Dextrans with MW of 2,000 to 10,000, exhibit the properties of an expandable coil. At MW below 2,000, dextran is more rod-like. The MW of dextran is measured by one or more of the following methods: low angle laser light scattering, size exclusion chromatography, copper-complexation and anthrone reagent colorometric reducing-end sugar determination and viscosity.
Application
Dextrane marqué à l′isothiocyanate de fluorescéine pour utilisation potentielle dans les études de perfusion chez l′animal.
FITC-dextran is used extensively in microcirculation and cell permeability research utilizing microfluorimetry. FITC-dextran has been used to study plant cell wall porosity and capillary permeability. Plasma proteins have been shown not to bind to FITC-dextran.
FITC-dextran is used in cardiovascular, microcirculation, perfusion, cell monolayer and cell membrane permeability research as fluorescent flux tracer compound that supports the measurement of processes such as blood flow, membrane damage, vascular drainage and renal elimination. Small FITC-dextrans are also used to measure processes such as endocytosis. FITC-Dextran 250 (FD 250) may be used as a model compound for development of methods to deliver molecules into protoplasts and to study drug release from structures such as hydrogels and liposomes. It may be used as a model compound to study microvasculature and blood brain barrier.
Notes préparatoires
Sigma typically tests the solubility of FITC dextrans in water at concentrations at or above 25 mg/ml. Solutions should be protected from light. In vivo, FITC-dextran is stable for more than 24 hours.
Autres remarques
To gain a comprehensive understanding of our extensive range of Dextrans for your research, we encourage you to visit our Carbohydrates Category page.
Mention d'avertissement
Warning
Mentions de danger
Conseils de prudence
Classification des risques
Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3
Organes cibles
Respiratory system
Code de la classe de stockage
11 - Combustible Solids
Classe de danger pour l'eau (WGK)
WGK 3
Point d'éclair (°F)
Not applicable
Point d'éclair (°C)
Not applicable
Équipement de protection individuelle
Eyeshields, Gloves, type N95 (US)
Certificats d'analyse (COA)
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Contenu apparenté
Dextran is a polymer of anhydroglucose. It is composed of approximately 95% alpha-D-(166) linkages. The remaining (163) linkages account for the branching of dextran.
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