FD2000S

Isotiocianato de fluoresceína–dextrana

average mol wt 2,000,000

• Sinônimo(s): FITC–Dextrana
• Número CAS: 60842-46-8
• Número MDL: MFCD00131092
• Código UNSPSC: 12352201
• NACRES: NA.25

Propriedades

• fonte biológica: synthetic (organic)
• conjugado: FITC conjugate
• Formulário: powder
• peso molecular: average mol wt 2,000,000
• Extensão da rotulagem: 0.003-0.020 mol FITC per mol glucose
• cor: yellow to orange
• solubilidade: H₂O: soluble 25 mg/mL
• temperatura de armazenamento: 2-8°C

Descrição

Descrição geral

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.

Aplicação

Dextrana marcada com isotiocianato de fluoresceína para possível uso em estudos de perfusão em animais.

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.

Fluorescein-dextran, 2000 kDa, was used for in vivo imaging of brain microvasculature in active mice using a minature integrated fluorecent microscope.[1] FITC-dextran, 2000 kDa (FD-2000) is used in cardiovascular, microcirculation, perfusion 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.[2][3] Fluorescein-dextran, 2000 kDa, may be used for in vivo imaging of brain microvasculature in active mice using a miniature integrated fluorescent microscope. [4] FITC-dextran has been used to study plant cell wall porosity.[5]

Nota de preparo

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.

Outras notas

To gain a comprehensive understanding of our extensive range of Dextrans for your research, we encourage you to visit our Carbohydrates Category page.

Informações de segurança

• Pictogramas: GHS07
• Palavra indicadora: Warning
• Frases de perigo: H315,H319,H335
• Declarações de precaução: P261 - P264 - P271 - P280 - P302 + P352 - P305 + P351 + P338
• Classificações de perigo: Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3
• Órgãos-alvo: Respiratory system
• Código de classe de armazenamento: 11 - Combustible Solids
• Classe de risco de água (WGK): WGK 3
• Ponto de fulgor (°F): Not applicable
• Ponto de fulgor (°C): Not applicable
• Equipamento de proteção individual: Eyeshields, Gloves, type N95 (US)