Thermo Scientific™

DyLight™ 504Q NHS Ester

Catalog number:  84513

 Related applications: Protein Labeling & Crosslinking

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Thermo Scientific DyLight 504Q dye is an azo-based dye that can be used to quench matching DyLight and Alexa Fluor dyes. This dye has a λmax of 504 nm (in PBS) and a molar extinction coefficient of 39,000 M-1cm-1. Use this dye with the same laser and filter sets suitable for DY-415-Co1, DyLight 488 and DEAC.

General features of DyLight Quencher Specialty Dyes:

Large selection—the largest family of dyes available for far red-emitting fluorescence applications
NHS ester reactive group—allows immediate labeling of antibodies, proteins, peptides and other amine-containing molecules through amide bond formation

DyLight Quencher Specialty Dyes are a family of non-fluorescent dyes designed for fluorescence quenching in FRET applications. The optimal quencher dye can be selected based upon its characteristic absorption properties that match the emission of a corresponding fluor. Each dye contains an amine-reactive NHS ester for simple modification of antibodies, proteins, peptides or other biomolecules through amide bond formation.

Criteria to consider when choosing a DyLight Quencher Specialty Dye
• Absorption wavelength—choose the quencher dye with the absorbance wavelength that matches the emission of your fluorophore and the instrument.
• Water solubility—choose a dye based on its relative hydrophilicity, which directly correlates to the number of negatively-charged sulfonates it has on its core structure. More hydrophilic dyes are best at maintaining water solubility of a labeled antibody and limiting the nonspecific binding of the conjugate. More hydrophobic dyes often are best at penetrating tissues and cell membranes in vivo, meaning that dyes with fewer sulfonates may work best for some applications.
• DyLight dye selection—the broad selection of red-emitting dyes allows a number of candidate dyes to be tested in an application for optimal performance.

• Other quenching applications

Related Products
DyLight™ 425Q NHS Ester
DyLight™ 543Q NHS Ester
DyLight™ 641Q NHS Ester
DyLight™ 662Q NHS Ester
DyLight™ 683Q NHS Ester
For Research Use Only. Not for use in diagnostic procedures.


Label or Dye: DyLight™ Fluor (Specialty)
Chemical Reactivity: Amine
Excitation⁄Emission (nm): 504⁄Q
Product Line: DyLight™
Product Size: 1 mg
Solubility: DMF (Dimethylformamide)

Contents & storage

Store at 4°C.


Manuals & protocols