FD40

Isotiocianato de fluoresceína-dextrano

average mol wt 40,000

• Sinónimos: FITC–Dextrano
• Número de CAS: 60842-46-8
• Número MDL: MFCD00131092
• Código UNSPSC: 12352201
• NACRES: NA.25

Propiedades

• origen biológico: bacterial (Leuconostoc mesenteroides)
• conjugado: FITC conjugate
• formulario: powder
• mol peso: average mol wt 40,000
• Extensión del etiquetado: 0.001-0.020 mol FITC per mol glucose
• color: light yellow to dark orange
• solubilidad: H₂O: 25 mg/mL
• temp. de almacenamiento: 2-8°C

Descripción

Descripción general

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.

Aplicación

Dextrano marcado con isotiocianato de fluoresceína para su posible uso en estudios de perfusión en animales.

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. Fluorescein-dextran, 40 kDa, may be used for the study of cell endocytic activity. FITC-dextran-40 may be used to study endothelial monolayer porosity and apical-basolateral movements within cell layers.

Nota de preparación

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.

Otras notas

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

Información de seguridad

• Pictogramas: GHS07
• Palabra de señalización: Warning
• Frases de peligro: H315,H319,H335
• Consejos de prudencia: P261 - P264 - P271 - P280 - P302 + P352 - P305 + P351 + P338
• Clasificaciones de peligro: Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3
• Órganos de actuación: Respiratory system
• Código de clase de almacenamiento: 11 - Combustible Solids
• Clase de riesgo para el agua (WGK): WGK 3
• Punto de inflamabilidad (°F): Not applicable
• Punto de inflamabilidad (°C): Not applicable
• Equipo de protección personal: Eyeshields, Gloves, type N95 (US)