FITC-CM-dextran

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Please send an e-mail to [email protected] if you would like to receive a quote, place a bulk order or if you wish to place your order manually. FITC-CM-dextrans are standard FITC-d extran carrying carboxymethyl-substituents. FITC-CM-dextrans have been developed for special studies on membranes and cells. The CM (carboxymethyl) group gives the product anionic (negative) charge. All batches are checked for molecular weight, degree of substitution, loss on drying and free FITC. TdB labs produce FITC-CM-dextrans from 4 kDa to 150 kDa. FITC-CM-dextran is supplied as a yellow powder. StructureFITC-CM-dextrans are manufactured by reacting selected dextran fractions with an activated carboxymethyl derivative in alkali whereby O-carboxymethyl groups are introduced along the dextran chain. The carboxyl content is approximately 5% which is equivalent to about one CM group for every five glucose units. Thereafter, fluorescein (FITC) groups are introduced by reaction with fluorescein isothiocyanate. The degree of substitution of FITC lies between 0.003 – 0.008. Spectral dataFITC-CM-dextran has an excitation maximum of 490 – 495 nm and an emission maximum of 520 ± 5 nm. Storage and stabilityFITC-CM-dextran is stable for more than 6 years when stored dry in well-sealed containers at ambient temperature. SolubilityFITC-CM-dextran dissolves readily in water. ApplicationsFITC-CM-dextrans are mostly used for studies of permeability and microcirculation. The carboxyl groups will impart an overall negative charge to the molecule, which may be valuable in gaining information on the permeability characteristics of cell membranes and tissues. The free carboxyl group is also useful for coupling other substances to the dextran chain. If you need larger quantities please contact us for a bulk quotation. Technical information Download SDS Download datafile Specifications FITC-CM-dextran 4 FITC-CM-dextran 20 FITC-CM-dextran 40 FITC-CM-dextran 70 FITC-CM-dextran 150 Show more