Cyanine5 maleimide

Cyanine5 Maleimides Microscopy
Cat. # Quantity Price Lead time
13080 1 mg $110.00 in stock
23080 5 mg $210.00 in stock
43080 25 mg $410.00 in stock
53080 50 mg $695.00 in stock
63080 100 mg $1190.00 in stock
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Cyanine5 maleimide is a mono-reactive dye which selectively couples with thiol groups (for example, with cysteines in peptides and proteins) to give labeled conjugates.

Cyanine5 is an analog of Cy5®, a common fluorophore which is compatible with various instrumentation like microscopes, imagers, and fluorescence readers.

For the labeling of antibodies and sensitive proteins we recommend to use the water soluble sulfo-Cyanine5 maleimide.

Cyanine5 maleimide, 63080
Cyanine5 maleimide, 63080
Cyanine5 maleimide, 63080
Cy5 maleimide structure
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Cy5 excitation and emission spectra

Cy5 excitation and emission spectra

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General properties

Appearance: dark blue powder
Molecular weight: 641.24
CAS number: 1437872-46-2 (without anion), 1437796-65-0 (chloride)
Molecular formula: C38H45ClN4O3
IUPAC name: 3H-​Indolium, 2-​[5-​[1-​[6-​[[2-​(2,​5-​dihydro-​2,​5-​dioxo-​1H-​pyrrol-​1-​yl)​ethyl]​amino]​-​6-​oxohexyl]​-​1,​3-​dihydro-​3,​3-​dimethyl-​2H-​indol-​2-​ylidene]​-​1,​3-​pentadien-​1-​yl]​-​1,​3,​3-​trimethyl-
Solubility: soluble in organic solvents (DMF, DMSO, dichloromethane), practically insoluble in water (31 uM, 23 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 maximum, nm: 646
ε, L⋅mol−1⋅cm−1: 250000
Emission maximum, nm: 662
Fluorescence quantum yield: 0.2
CF260: 0.03
CF280: 0.04

Product citations

  1. Deol, K.K.; Crowe, S.O.; Du, J.; Bisbee, H.; Guenette, R.G.; Strieter, E.R. Proteasome-Bound UCH37 Debranches Ubiquitin Chains to Promote Degradation. bioRxiv, preprint. doi: 10.1101/2020.02.21.960088
  2. Yang, M.; Zhang, L.; Sun, R.; Zhong, W.; Yang, Y.; Chen, C. Streptococcus pyogenes Cas9 displays biased one-dimensional diffusion on dsDNA to search for a target. bioRxiv, preprint. doi: 10.1101/754564
  3. Ast, J.; Arvaniti, A.; Fine, N.H.F.; Nasteska, D.; Ashford, F.B.; Stamataki, Z.M Koszegi, Z.; Bacon, A.; Trapp, S.; Jones, B.J.; Hastoy, B.; Tomas, A.; Reissaus, C.; Linnemann, A.K.; D'Este, E.; Calebiro, D.; Johnsson, K.; Podewin, T.; Broichhagen, J.; Hodson, D.J. LUXendins reveal endogenous glucagon-like peptide-1 receptor distribution and dynamics. bioRxiv, preprint. doi: 10.1101/557132
  4. Taipaleenmäki, E.; Christensen, G.; Brodszkij, E.; Mouritzen, S.A.; Gal, N.; Madsen, S.; Hedemann, M.S.; Knudsen, T.A.; Jensen, H.M.; Christiansen, S.L.; Sparsø, F.V.; Städler, B. Mucopenetrating polymer - Lipid hybrid nanovesicles as subunits in alginate beads as an oral formulation. Journal of Controlled Release, 2020, 322, 470–485. doi: 10.1016/j.jconrel.2020.03.047
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Cy® is a trademark of GE Healthcare.
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