TFAX 488, TFP
Chemical Name: 3,6-Diamino-9-[2-carboxy-4-[(2,3,5,6-tetrafluorophenoxy)carbonyl]phenyl]-4,5-disulfoxanthylium bis(triethylammmonium) salt
Biological Activity
TFAX 488, TFP is an amine reactive green fluorescent dye. Insensitive to pH in the range 4 - 10. Forms bright and photostable conjugates with proteins and antibodies. Less susceptible to spontaneous hydrolysis during conjugation reactions compared to SE or NHS dyes. Also displays greater stability compared to NHS and SE versions, typically lasting several hours. Suitable for use in flow cytometry, two-photon excitation microscopy (TPE), and super resolution microscopy techniques, such as dSTORM, SIM and STED. Excitation maximum = 495 nm; emission maximum = 515 nm; extinction coefficient = 73,000 M-1cm-1; quantum yield = 0.92.Optical Data for TFAX 488, TFP
| Emission Color | Green |
|---|---|
| Brightness | |
| λabs | 495 nm |
| λem | 515 nm |
| Extinction Coefficient (ε) | 73,000 M-1cm-1 |
| Quantum Yield (φ) | 0.92 |
| Closest Laser line | 488 nm |
| Reactive Group | TFP |
| Reactivity | Primary amines |
| Cell Permeable | No |
| pH Sensitivity | pH insensitive pH 4-10 |
| Application | flow cytometry, two-photon excitation microscopy, dSTORM, SIM, STED |
| Alternative For | Alexa Fluor® 488 TFP ester, AF 488, FITC, Cy2 |
Alexa Fluor® is a registered trademark of Molecular Probes, Inc, a Thermo Fisher Scientific Company.
Plan Your Experiments
Use our spectra viewer to interactively plan your experiments, assessing multiplexing options. View the excitation and emission spectra for our fluorescent dye range and other commonly used dyes.
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Technical Data
The technical data provided above is for guidance only.
For batch specific data refer to the Certificate of Analysis.
Tocris products are intended for laboratory research use only, unless stated otherwise.
Background References
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On the seeding and oligomerization of pGlu-amyloid peptides (in vitro).
Schilling et al.
Biochemistry, 2006;45:12393
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