Cyanine3 maleimide
| Cat. # | Quantity | Price | Lead time | Buy this product |
|---|---|---|---|---|
| 11080 | 1 mg |
$125.00
|
in stock | |
| 21080 | 5 mg |
$224.00
|
in stock | |
| 41080 | 25 mg |
$449.00
|
in stock | |
| 51080 | 50 mg |
$895.00
|
in stock | |
| 61080 | 100 mg |
$1490.00
|
in stock |
Thiol mono-reactive Cyanine3 dye. This reagent can be used to attach Cyanine3 fluorophore (an analog of Cy3®) to proteins and peptides containing cysteine residues, as well as to other thiolated molecules (such as thiol-containing oligonucleotides).
Cystines should be reduced with TCEP (tris-carboxyethylphosphine) or other appropriate reductant prior to the labeling.
Labeling with Cyanine3 maleimide is selective, and efficient.
We recommend using water-soluble Sulfo-Cyanine3 maleimide for the labeling of antibodies and other sensitive proteins.
Cy3 absorbance and emission spectra
Recommended protocol
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General properties
| Appearance: | red powder |
| Molecular weight: | 666.56 |
| Molecular formula: | C36H43N4O3BF4 |
| Solubility: | well soluble in DMSO (0.50 M = 330 g/L), in DMF, dichloromethane, very poorly soluble in water (0.57 mM = 420 mg/L) |
| 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: | 555 |
| ε, L⋅mol−1⋅cm−1: | 150000 |
| Emission maximum, nm: | 570 |
| Fluorescence quantum yield: | 0.31 |
| CF260: | 0.04 |
| CF280: | 0.09 |
Product citations
- He, Y.; Zalenski, N.; Stephenson, A. A.; Raper, A. T.; Ghimire, C.; Suo, Z. Conformational Transitions of Streptococcus Pyogenes Cas9 Induced by Salt and Single-Guide RNA Binding. Journal of Biological Chemistry, 2025, 301(2), 108120. doi: 10.1016/j.jbc.2024.108120
- Iudin, D.; Gerridzen, L. J. J. A.; N. Bernal, P.; Schuurmans, C. C. L.; Neumann, M.; Nguyen, L.; van Steenbergen, M. J.; Hak, J.; Li, W.; Casadidio, C.; van Genderen, A. M.; Masereeuw, R.; Levato, R.; Zhang, Y. S.; van Ravensteijn, B. G. P.; Vermonden, T. In-Depth Investigation of Electrostatic Interaction-Based Hydrogel Shrinking for Volumetric Printing and Tissue Engineering Applications. Biomacromolecules, 2025, 26(7), 4108–4123. doi: 10.1021/acs.biomac.5c00117
- Burgos-Bravo, F.; Tong, A. B.; Li, C.; Díaz-Celis, C.; Kaplan, C. D.; LeRoy, G.; Reinberg, D.; Bustamante, C. FACT Weakens the Nucleosomal Barrier to Transcription and Preserves Its Integrity by Forming a Hexasome-like Intermediate. Molecular Cell, 2025, 85(11), 2097-2109.e8. doi: 10.1016/j.molcel.2025.05.002
- Fischer, J.M.; Stewart, M.; Dai, M.; Drennan, S.; Holland, S.; Quentel, A.; Sabuncu, S.; Kingston, B.R.; Dengos, I.; Xiang, L.; Bonic, K.; Goncalves, F.; Yi, X.; Ranganathan, S.; Branchaud, B.P.; Muldoon, L.L.; Barajas, R.F.; Yildirim, A. Peptide Amphiphiles Hitchhike on Endogenous Biomolecules for Enhanced Cancer Imaging and Therapy. bioRxiv, 2024, preprint. doi: 10.1101/2024.02.21.580762
Cy® is a trademark of GE Healthcare.
This Product is offered and sold for research purposes only. It has not been tested for safety and efficacy in food, drug, medical device, cosmetic, commercial or any other use. Supply does not express or imply authorization to use for any other purpose, including, without limitation, in vitro diagnostic purposes, in the manufacture of food or pharmaceutical products, in medical devices or in cosmetic products.
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