ATTO 390 Streptavidin Fluorescent Label 1 mg
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Product No. AD-390-61
ATTO 390 is a novel fluorescent label with a coumarin structure. Characteristic features of the label are high fluorescence quantum yield, large Stokes-shift, good photo-stability, and low molecular weight.
ATTO-TEC is a wholly owned subsidiary of Leica Microsystems
Optical properties
- λ abs = 390 nm
- ε max = 2.4×104 M -1 cm -1
- λ fl = 476 nm
- n fl = 90 %
- τ fl = 5.0 ns
- CF 260 = ε 260 /ε max = 0.46
- CF 280 = ε 280 / ε max = 0.09
ATTO 390 is a novel fluorescent label with a coumarin structure. Characteristic features of the label are high fluorescence quantum yield, large Stokes-shift, good photo-stability, and low molecular weight. ATTO 390 is moderately hydrophilic. Its fluorescence can be excited efficiently in the range 360 - 410 nm. A useful excitation source is, e.g., a Mercury Arc Lamp with its lines at 365 nm and 405 nm.
Characteristic properties of our fluorescent dyes
- Strong absorption (high extinction coefficient)
- High fluorescence quantum yield
- High photostability
| Modification | Streptavidin |
| Unit of Measure | 1 mg |
| Product Group | ATTO 390 |
| Product Type | Fluorescent Label |
| Emission Line (nm) | 365 |
| Fluorescence Maximum (nm) | 476 |
| Light Source | Mercury arc lamp |
| Correction Factor Used in Calculation of Degree of Labeling (DOL) in Case of Dye-DNA Conjugates (CF260 = e260 /emax ) | 0.46 |
| Correction Factor Used in Calculation of Degree of Labeling (DOL) in Case of Dye-Protein Conjugates (CF280 = e280 /emax) | 0.09 |
| Increase of Molecular Mass on Conjugation with ATTO-label (NHS-ester : amine) | 325.4 |
| Increase of Molecular Mass on Conjugation with ATTO-label (maleimide : thiol) | 465.5 |
| Change of Electrical Charge on Conjugation with ATTO-Label | 0 |
| Microscope Group | Fluorescent Labels |
| Applications | Fluorescence |
| Longest Wavelength Absorption Maximum (nm) | 390 |
| Molar Decadic Extinction Coefficient at the Longest Wavelength Absorption Maximum (M-1 cm-1) | 24000 |
| Fluorescence Quantum Yield (%) | 90 |
| Real Fluorescence Decay Time (ns) | 5 |