sulfo-Cyanine5-PEG3-biotin
| Cat. # | Quantity | Price | Lead time | Buy this product |
|---|---|---|---|---|
| 2449-1mg | 1 mg |
$120
|
in stock | |
| 2449-5mg | 5 mg |
$290
|
in stock | |
| 2449-50mg | 50 mg |
$1270
|
in stock |
sulfo-Cyanine5 is a far-red fluorophore widely used for biomolecule labeling, with excitation maximum at 646 nm and emission maximum at 662 nm. Far-red fluorescent tags with excitation above 600 nm and emission further than 650 nm are valuable for imaging techniques because of the lower background autofluorescence at these wavelengths. Besides, far-red fluorescent labels can be imaged simultaneously with near-red, orange, green, and blue tags, which is advantageous for multicolor imaging.
Biotin, or the water-soluble vitamin H, is well known not only for playing essential roles in various crucial metabolic cellular reactions but also for its extremely high affinity for avidin, a glycoprotein of egg white. Avidin, streptavidin (bacterial analogue of avidin), and neutravidin (deglycosylated avidin) bind non-cooperatively to biotin with high affinity. Thus, sulfo-Cyanine5 biotin conjugate can be used for detecting and quantifying biotin binding sites of avidin, streptavidin, and neutravidin in samples of different origin.
sulfo-Cyanine5 biotin conjugate is a water-soluble reagent and its fluorescence is pH independent from pH 4 to pH 10. A flexible PEG3 linker between biotin moiety and fluorescent tag provides binding to avidin, streptavidin, or neutravidin without steric troubles.
The major applications of sulfo-Cyanine5 biotin conjugate include imaging (e.g. primary and secondary antibody labeling for Western Blotting, immunoassay, cyto- and histochemistry, flow cytometry), affinity and dissociation constant measuring, streptavidin-based sensors, etc.
Absorption and emission spectra of sulfo-Cyanine5
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General properties
| Appearance: | dark blue solid |
| Molecular weight: | 1037.36 |
| Molecular formula: | C48H65N6KO11S3 |
| Solubility: | good in water, DMF, DMSO |
| 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: | 271000 |
| Emission maximum, nm: | 662 |
| Fluorescence quantum yield: | 0.28 |
| CF260: | 0.04 |
| CF280: | 0.04 |
Product citations
- Tawara, M. H.; Correa, J.; Leire, E.; Delgado Gonzalez, B.; Parcero-Bouzas, S.; Liko, F.; Fernandez-Megia, E. Bioactive Polymeric Scaffolds: Multivalent Functionalization by Thermal Azide–Alkyne Cycloaddition with Alkynyl Dicarbamates. Biomacromolecules, 2025, 25(4), 2553–2564. doi: 10.1021/acs.biomac.5c00038
- Caparco, A. A.; González-Gamboa, I.; Chang-Liao, S.; Steinmetz, N. F. A Plug-and-Play Strategy for Agrochemical Delivery Using a Plant Virus Nanotechnology. Journal of Nanoparticle Research, 2024, 26(12), 280. doi: 10.1007/s11051-024-06187-w
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