sulfo-Cyanine3-PEG3-biotin
Cat. # | Quantity | Price | Lead time | Buy this product |
---|---|---|---|---|
3079-1mg | 1 mg | $120 | in stock | |
3079-5mg | 5 mg | $290 | in stock |
This fluorescent conjugate is useful for streptavidin-based fluorescent assays and visualization of the streptavidin/avidin-labeled biomolecules. Streptavidin, a protein with a high affinity to biotin, has four binding centers for biotin. The high stability of biotin/streptavidin complex gives the opportunity to build different kinds of assays. For example, a target molecule with affinity to the surface can be conjugated with biotin and immobilized on a solid surface. After it, streptavidin can be bound to the biotinylated surface and washed. Then, bound streptavidin on the surface can be visualized with the biotin-dye conjugate.
The long and hydrophilic PEG3 linker facilitates binding and decreases nonspecific interactions.
Absorption and emission spectra of sulfo-Cyanine3
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Appearance: | dark colored solid |
Molecular weight: | 1011.32 |
Molecular formula: | C46H63N6KO11S3 |
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: | 548 |
ε, L⋅mol−1⋅cm−1: | 162000 |
Emission maximum, nm: | 563 |
Fluorescence quantum yield: | 0.1 |
CF260: | 0.03 |
CF280: | 0.06 |