Thermo Scientific™ DyLight™ Long Stokes Shift Specialty Dyes

Label antibodies or other proteins for FRET and multiplex fluorescence assays using fluors with large Stokes shifts (488nm excitation; yellow to far-red emission).

Brand: Thermo Scientific™

Manufacturer Part Number: 82491

UNSPSC: 41116012

Code: PN

Additional Details:
Additional Details: Weight: 0.01000kg

Product Code. 12371943

Quantity Price
1 £ 217.0 / 1mg
Estimated Shipment date
from Supplier 08-05-2017
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Description and Specification


Formulation Long stokes shift NHS ester activated Coumarin derivative
Sufficient For 1 use to label a total of 7mg of IgG using typical conditions
Description DyLight 515-LS NHS Ester
Quantity 1mg

DyLight Long Stokes Shift Specialty Dyes are a family of labeling agents that provide bright fluorescent detection for multiplexed imaging. The dyes share a common excitation range, while their emission properties extend from the green to the far red wavelengths. The dyes are based on a core coumarin structure that is modified to emit at different wavelengths. Each dye contains an amine-reactive NHS ester for rapid modification of antibodies, proteins, peptides or other biomolecules through amide bond formation. DyLight Long Stokes Shift Dyes can be used individually or combined with DyLight 488 for multiplexed analysis. The excitation and emission peaks are sufficiently separated so as to minimize dye-dye quenching in assays.


  • Single excitation wavelength–DyLight Long Stokes Shift Dyes all can be excited together at 488nm using an Argon laser

  • Image multiple targets simultaneously–the four Long Stokes Shift Dyes can be used with DyLight 488 for multiplex fluorescence applications

  • NHS ester reactive group–allows immediate labeling of antibodies, proteins, peptides and other amine-containing molecules through amide bond formation

  • Multiple solubility options –choose from hydrophilic to hydrophobic dyes to optimize the right dye label for the best performance in an application

  • Large Stokes shift inhibits quenching–minimal overlap between excitation and emission peaks inhibits dye-dye quenching effects

  • Use in FRET-based assays– the extremely broad separation between excitation and emission peaks allow for use of the Long Stokes Shift Dyes in energy transfer applications where the acceptor dye is spectrally far removed from the excitation wavelength

Criteria to consider when choosing a DyLight Long Stokes Shift Specialty Dye:

  • Excitation and emission wavelengths–all dyes share a common excitation wavelength range with options for emission from the green to the far red wavelengths

  • Water solubility–DyLight Long Stokes Shift Dyes can be initially solubilized in methanol, ethanol, DMF or DMSO with transfer into an aqueous buffer medium for labeling biomolecules

Recommended for:

Quenchers and FRET pairs; Conjugation to silica particles; STED microscopy; Multicolor microscopy; 4Pi microscopy; Dual-color 3D nanoscopy; Dynamic light scattering; Graded stokes shift; Duplex enhanced RT-PCR; High-resolution optical microscopy