| Chemical Properties | Back Directory | [solubility ]
可溶于甲醇，DMF等有机溶剂，极易溶于水 | [Appearance]
Dark blue solid | [ex/em]
678/706 nm (PBS buffer) | [ε(extinction coefficient)]
211000 L⋅mol−1⋅cm−1 | [Φ(quantum yield)]
0.21 |
| Hazard Information | Back Directory | [Description]
sulfo-Cyanine5.5 is a water-soluble, hydrophilic fluorophore with emission in the far-red area of the spectrum, an analog of Cy5.5®. Like other cyanine dyes, sulfo-Cyanine5.5 has an outstanding molar extinction coefficient, giving rise to its bright fluorescence. The molecule contains four sulfo groups that provide hydrophilicity and negative charge to the fluorophore — this minimizes non-specific binding.
The azide group of Sulfo-Cyanine5.5 azide can be conjugated with terminal alkynes in the presence of copper(I) catalyst or with cycloalkynes in copper-free strain-promoted reaction.
The reagent possesses high hydrophilicity and is recommended for labeling biomolecules in an aqueous environment. | [Uses]
Sulfo-Cyanine5.5 azide tripotassium, a near-infrared (NIR) fluorescent dye, is an azide-functionalized Sulfo-Cyanine5.5 (Ex=678 nm, Em=694 nm). Sulfo-Cyanine5.5 azide tripotassium can react with alkynes for Click Chemistry labeling[1]. It contains an azide group and can undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules containing alkyne groups. It can also undergo ring strain-promoted alkyne-azide cycloaddition (SPAAC) with molecules containing DBCO or BCN groups. | [References]
[1] Katrin Spinnler, et al. An Alkyne-functionalized Arginine for Solid-Phase Synthesis Enabling "Bioorthogonal" Peptide Conjugation. ACS Med Chem Lett. 2019 Sep 30;11(3):334-339. DOI:10.1021/acsmedchemlett.9b00388 | [Abs/Em Maxima]
673/691 nm | [Fluoresene quantum yield]
0.21 | [Extinction Coefficient]
211000 | [CF260]
0.09 | [CF280]
0.11 |
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