Sulfo-Cyanine5 maleimide

Cat. # Quantity Price Lead time
13380 1 mg $110.00 in stock
23380 5 mg $290.00 in stock
43380 25 mg $690.00 in stock
53380 50 mg $1270.00 in stock
63380 100 mg $1990.00 in stock

A water soluble, hydrophilic sulfo-Cyanine5 maleimide (Cy5® maleimide analog). We recommend this product for protein labeling, including labeling of antibodies as a perfect replacement for Cy5® maleimide. Labeled proteins can be easily separated from unreacted dye by gel filtration, spin column purification, dialysis, electrophoresis or chromatography.

An analog without sulfo groups, Cyanine5 maleimide, is also available.

Sulfo-Cyanine5 absorbance and emission spectra

Sulfo-Cyanine5 absorbance and emission spectra

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General properties

Appearance: dark blue powder
Molecular weight: 803.00
CAS number: 2242791-82-6 (potassium salt); 2130955-10-9 (inner salt); 2242791-81-5 (inner salt); 2301999-22-2 (sodium salt)
Molecular formula: C38H43KN4O9S2
Solubility: soluble in water, DMSO, DMF
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: 271000
Emission maximum, nm: 662
Fluorescence quantum yield: 0.28
CF260: 0.04
CF280: 0.04

Product citations

  1. Shukla, Sourabh and Roe, Anne Jessica and Liu, Ruifu and Veliz, Frank A. and Commandeur, Ulrich and Wald, David N. and Steinmetz, Nicole F. Affinity of plant viral nanoparticle potato virus X (PVX) towards malignant B cells enables cancer drug delivery. Biomaterials Science, in press. doi: 10.1039/D0BM00683A
  2. Nemec, A.A.; Tomko, R.J. A suite of PCR-based peptide tagging plasmids to permit epitope-targeted enzymatic functionalization of yeast proteins. Yeast, 2020, 37(5–6), 327–335. doi: 10.1002/yea.3471
  3. Cioloboc, D.; Kurtz, D.M. Targeted cancer cell delivery of arsenate as a reductively activated prodrug. Journal of Biological Inorganic Chemistry, 2020, 25(3), 441–449. doi: 10.1007/s00775-020-01774-3
  4. Baranova, N.; Radler, P.; Hernández-Rocamora, V.M.; Alfonso, C.; López-Pelegrin, M.; Rivas, G.; Vollmer, W.; Loose, M. Diffusion and capture permits dynamic coupling between treadmilling FtsZ filaments and cell division proteins. Nature Microbiology, 2020, 5, 407–417. doi: 10.1038/s41564-019-0657-5
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