AF 488 TFP ester
Cat. # | Quantity | Price | Lead time | Buy this product |
---|---|---|---|---|
118T0 | 1 mg | $165 | in stock | |
218T0 | 5 mg | $510 | in stock | |
418T0 | 25 mg | $1650 | in stock |
AF 488 is a bright and photostable dye well suited for labeling sensitive proteins and antibodies due to its hydrophilicity. AF 488 is a sulfonated derivative of Rhodamine 110 (R110), and, like other rhodamines, AF 488 is represented by two (5- and 6-) isomers. Both isomers have almost identical photophysical properties but require their separation since using a mixture of isomers leads to the «doubling» of the peaks of the labeled products during HPLC and electrophoretic separation. This product contains isomerically pure 5-AF 488.
Tetrafluorophenyl (TFP) esters belong to a group of activated esters widely used to conjugate fluorophores to the primary and secondary amines of biomolecules. Like hydroxysuccinimide (NHS) esters, they form a strong amide bond between the dye and the compound being modified; however, TFP esters are more stable at the basic pH values typically associated with reactions with amines and are also less susceptible to spontaneous hydrolysis.
Absorption and emission spectra of AF 488
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Azide-PEG4-amine
PEG4 amine azide is a bifunctional linker with amine and azide functional groups. It is based on a tetraethyleneglycol core. The length of the PEG4 linker is 1.4 nm.AF 488 NHS ester
AF 488 NHS ester, a bright, photostable, and hydrophilic fluorescent dye for the green channel.Cyanine5 maleimide
Cyanine5 maleimide reacts with thiols to give dye labeled conjugates.General properties
Appearance: | red crystals |
Molecular weight: | 681.53 |
CAS number: | 2133404-55-2 |
Molecular formula: | C27H13F4N2O11S2- |
Solubility: | good in water, DMF, DMSO |
Quality control: | NMR 1H and HPLC-MS (95+%) |
Storage conditions: | 24 months after receival at -20°C in the dark. Transportation: at room temperature for up to 3 weeks. Desiccate. Avoid prolonged exposure to light. |
MSDS: | Download |
Product specifications |
Spectral properties
Excitation/absorption maximum, nm: | 495 |
ε, L⋅mol−1⋅cm−1: | 71800 |
Emission maximum, nm: | 519 |
Fluorescence quantum yield: | 0.91 |
CF260: | 0.16 |
CF280: | 0.10 |