Cyanine5 maleimide

Maleimides Cyanine5
Cat. # Quantity Price Lead time
13080 1 mg $125 in stock
23080 5 mg $260 in stock
43080 25 mg $510 in stock
53080 50 mg $895 in stock
63080 100 mg $1490 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
Structure of Cyanine5 maleimide
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Cyanine5 excitation and emission spectra

Cyanine5 excitation and emission spectra

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Cyanine5 carboxylic acid

Cyanine5 carboxylic acid, unactivated dye. An analog of Cy5®; free carboxylic acid.

General properties

Appearance: dark blue powder
Molecular weight: 605.8
CAS number: 1437872-46-2 (without anion)
Molecular formula: C38H45N4O3
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/absorption 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. Frazier, C.L.; Deb, D.; Weeks, A.M. Engineered reactivity of a bacterial E1-like enzyme enables ATP-driven modification of protein C termini. bioRxiv, 2024, preprint. doi: 10.1101/2024.05.13.593989
  2. Huang, L.; Liu, P.; Du, Y.; Pan, D.; Lee, A.; Wolfe, S.A.; Wang, Y.-X. A brown fat-enriched adipokine, ASRA, is a leptin receptor antagonist that stimulates appetite. bioRxiv, 2024, preprint. doi: 10.1101/2023.09.12.557454
  3. Johnson, J.L.; Steele, J.H.; Lin, R.; Stepanov, V.G.; Gavriliuc, M.N.; Wang, Y. Multi-Channel smFRET study reveals a Compact conformation of EF-G on the Ribosome. bioRxiv, 2024, preprint. doi: 10.1101/2024.01.27.577133
  4. Ernst, M.; Orabi, E.A.; Stockbridge, R.B.; Faraldo-Gómez, J.D.; Robertson, J.L. Dimerization mechanism of an inverted-topology ion channel in membranes. Proceedings of the National Academy of Sciences of the United States of America, 2024, 120(47), e2308454120. doi: 10.1073/pnas.2308454120
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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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