Cyanine3 maleimide

Cat. # Quantity Price Lead time
11080 1 mg $125 in stock
21080 5 mg $260 in stock
41080 25 mg $510 in stock
51080 50 mg $895 in stock
61080 100 mg $1490 in stock
Found better price? Let us know and we will propose the way forward!

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

Cy3 absorbance and emission spectra

Customers also purchased with this product

FAM azide, 6-isomer

FAM (fluorescein) azide, 6-isomer is a commonly used fluorescent dye azide for сlick сhemistry.

BDP TR X NHS ester

BDP TR X NHS ester is a derivative of BDP TR containing a long linker based on aminohexanoic acid (C6). The dye has absorption and emission close to ROX. The NHS ester function can be used to conjugate proteins and peptides.

Cyanine5.5 DBCO

Cyanine5.5 is a far-red / NIR emitting dye that is useful for bioimaging studies. Cyanine5.5 DBCO is a derivative of the dye with a cycloalkyne moiety for copper-free click chemistry.

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

  1. Chadda, R.; Lee, T.; Mahoney-Kruszka, R.; Kelley, E. G.; Bernhardt, N.; Sandal, P.; Robertson, J. L. A Thermodynamic Analysis of CLC Transporter Dimerization in Lipid Bilayers. Proceedings of the National Academy of Sciences, 2023, 120(41), e2305100120. doi: 10.1073/pnas.2305100120
  2. Song, Q.-X.; Liu, N.-N.; Liu, Z.-X.; Zhang, Y.-Z.; Rety, S.; Hou, X.-M.; Xi, X.-G. Nonstructural N- and C-Tails of Dbp2 Confer the Protein Full Helicase Activities. Journal of Biological Chemistry, 2023, 299(5), 104592. doi: 10.1016/j.jbc.2023.104592
  3. Naeimipour, S.; Boroojeni, F. R.; Lifwergren, P.; Selegård, R.; Aili, D. Multimodal andDynamic Cross-Linking of Modular Thiolated Alginate-Based Bioinks. Materials Today Advances, 2023, 19, 100415. doi: 10.1016/j.mtadv.2023.100415
  4. Binda, O.; Juillard, F.; Ducassou, J.N.; Kleijwegt, C.; Paris, G.; Didillon, A.; Baklouti, F.; Corpet, A.; Couté, Y.; Côté, J.; Lomonte, P. SMA-linked SMN mutants prevent phase separation properties and SMN interactions with FMRP family members. Life Science Alliance, 2023, 6(1), e202201429. doi: 10.26508/lsa.202201429
Show more (45)
Your item has been added. View your cart or proceed to checkout
The count of items is incorrect.