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Sulfo-Cyanine3.5 is a fluorescent dye with absorption and emission spectra between those of Cyanine3 and Cyanine5. Because of its spectral characteristics, this fluorophore is widely used in BRET and FRET experiments both as a pair donor and acceptor.
Sulfo-Cyanine3.5 is a sulfonated derivative of Cyanine3.5 dye because it contains four additional sulfo groups, which ensures high water solubility of the dye and its conjugates. This allows working with this reagent in aqueous solutions without adding organic solvents.
This reagent is an azide derivative of sulfo-Cyanine3.5 dye for Click Chemistry reactions. The azide group allows conjugating the fluorophore with molecules containing alkyne or cycloalkyne groups, including various biomolecules, small molecules, and polymers, using copper-catalyzed Click chemistry and copper-free spAAC reaction.
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Absorption and emission spectra of sulfo-Cyanine3.5
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Sulfo-Cyanine5.5 azide
Sulfo-Cyanine5.5 azide is a derivative of water soluble far red emitting fluorescent cyanine dye. The azide group can be conjugated by either copper-catalyzed or copper free Click chemistry. The reagent possesses high aqueous solubility and hydrophilicity, and recommended for the labeling of biomolecules in aqueous environment.
