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 5 days
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 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. Tischer, D.; Weiner, O. Optogenetic Tuning of Protein-protein Binding in Bilayers Using LOVTRAP. Bio-protocol, 2020, 10(17), e3745. doi: 10.21769/BioProtoc.3745
  2. Zhang, N.; Shi, S.; Yoo, B.; Yuan, X.; Li, W.; Zhang, S. 2D-HELS MS Seq: A General LC-MS-Based Method for Direct and de novo Sequencing of RNA Mixtures with Different Nucleotide Modifications. Journal of Visualized Experiments, 2020, e61281. doi: 10.3791/61281
  3. Jordan, T.; O’Brien, M.A.; Spatarelu, C.-P.; Luke, G.P. Antibody-Conjugated Barium Titanate Nanoparticles for Cell-Specific Targeting. ACS Applied Nano Materials, 2020, 3(3), 2636–2646. doi: 10.1021/acsanm.0c00019
  4. Wouters, S.; Vugs, W.; Arts, R.; de Leeuw, N.; Teeuwen, R.; Merkx, M. Bioluminescent antibodies through photoconjugation of protein-G-luciferase fusion proteins. Bioconjugate Chemistry, 2020, 31(3), 656–662. doi: 10.1021/acs.bioconjchem.9b00804
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