Sulfo-Cyanine3 maleimide

Cat. # Quantity Price Lead time
11380 1 mg $110.00 in stock
21380 5 mg $290.00 in stock
41380 25 mg $690.00 in stock
51380 50 mg $1270.00 in stock
61380 100 mg $1990.00 in stock

Sulfo-Cyanine3 maleimide is a water soluble, thiol reactive dye for the labeling with hydrophilic sulfo-Cyanine3 fluorophore. This is an analog of Cy3® maleimide.

This product is recommended for the labeling of antibodies and other labile proteins in mild, purely aqueous conditions. The dye is water soluble and does not require use of organic co-solvent.

A non-sulfonated Cyanine3 maleimide is available.

Sulfo-Cyanine3 maleimide

Sulfo-Cyanine3 maleimide

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General properties

Appearance: red powder
Molecular weight: 776.96
CAS number: 1656990-68-9
Molecular formula: C36H41KN4O9S2
IUPAC name: 3H-​Indolium, 2-​[3-​[1-​[6-​[[2-​(2,​5-​dihydro-​2,​5-​dioxo-​1H-​pyrrol-​1-​yl)​ethyl]​amino]​-​6-​oxohexyl]​-​1,​3-​dihydro-​3,​3-​dimethyl-​5-​sulfo-​2H-​indol-​2-​ylidene]​-​1-​propen-​1-​yl]​-​1,​3,​3-​trimethyl-​5-​sulfo-​, inner salt, potassium salt
Solubility: soluble in water (0.39 M = 30 g/L), DMF, DMSO
Quality control: NMR 1H, HPLC-MS (95+%)
Storage conditions: Storage: 24 months after receival at -20°C in the dark. Transportation: at room temperature for up to 3 weeks. Avoid prolonged exposure to light. Desiccate.
MSDS: Download
Product specifications

Spectral properties

Excitation/absorption maximum, nm: 548
ε, L⋅mol−1⋅cm−1: 162000
Emission maximum, nm: 563
Fluorescence quantum yield: 0.1
CF260: 0.03
CF280: 0.06

Product citations

  1. Ast, J.; Novak, A.N.; Podewin, T.; Fine, N.H.F.; Jones, B.; Tomas, A.; Birke, R.; Roßmann, K.; Mathes, B:; Eichhorst, J.; Lehmann, M.; Linnemann, A.K.; Hodson, D.J.; Broichhagen, J. An expanded LUXendin color palette for GLP1R detection and visualization in vitro and in vivo. ChemRxiv, preprint. doi: 10.33774/chemrxiv-2021-7rngq
  2. Mohale, M.; Gundampati, R.K.; Thallapuranam, S.; Heyes, C.D. Site-specific labeling and functional efficiencies of human fibroblast growth Factor-1 with a range of fluorescent dyes in the flexible N-Terminal region and a rigid β-turn region. Analytical Biochemistry, 2022, 640, 114524. doi: 10.1016/j.ab.2021.114524
  3. Bauer, B.W.; Davidson, I.F.; Canena, D.; Wutz, G.; Tang, W.; Litos, G.; Horn, S.; Hinterdorfer, P.; Peters, J.-M. Cohesin mediates DNA loop extrusion by a “swing and clamp” mechanism. Cell, 2021, 184(21), 5448--5464.e22. doi: 10.1016/j.cell.2021.09.016
  4. Deckard, C.E.; Sczepanski, J.T. Reversible chromatin condensation by the DNA repair and demethylation factor thymine DNA glycosylase. Nucleic Acids Research, 2021, 49(5), 2450–2459. doi: 10.1093/nar/gkab040
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