DyLight™ 755-4xPEG Maleimide

Catalog number: 62297

Thermo Scientific™  Related applications: Protein Labeling & Crosslinking

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Description

Thermo Scientific DyLight 755-4xPEG Sulfhydryl-Reactive Dye is a maleimide-activated derivative of our high-performance DyLight 755 Dye used to fluorescently label cysteine-containing peptides, proteins or other biomolecular probes.

The DyLight 755-4xPEG dye contains 4 polyethylene glycol (PEG) chains that are non-cytotoxic, enhance fluorescence and reduce nonspecific binding of conjugates made with them. Conjugates made with DyLight 755-4xPEG Dye can be used as molecular probes for cellular imaging and other fluorescence detection methods. The NIR fluorescence properties of DyLight 755-4xPEG Dye make it especially useful in a variety of biological, chemical, and pharmaceutical applications, including in vivo imaging. The PEG chains also improve solubility of the dyes and labeled molecules in aqueous solution, aid in cell permeability and improve tissue retention.

Features of DyLight 755-4xPEG Maleimide:

High fluorescence intensity—significantly brighter fluorescence than Alexa Fluor™ 750
PEGylated—improves solubility in aqueous solution and aids in cell permeability
Specific—maleimide-activated dye labels proteins and other molecules at reduced sulfhydryls (-SH)

Applications:
• Fluorescence microscopy
In vivo or ex vivo imaging
• Cell-based assays
• Flow cytometry/fluorescence-activated cell sorting (FACS)

DyLight 755-4xPEG Sulfhydryl-Reactive Dye is activated with a maleic acid imide (maleimide) moiety to form a reactive alkylation reagent. Labeling occurs through reaction of the maleimide-activated dye with reduced sulfhydryl groups (-SH) to form stable thioether bonds. Maleimides are specific for sulfhydryl groups between pH 6.5-7.5. Learn more about maleimide chemistry.
For Research Use Only. Not for use in diagnostic procedures.

Specifications

Solubility: DMF (Dimethylformamide)
Label or Dye: DyLight™ 755
Product Size: 1 mg
Chemical Reactivity: Thiol
Excitation⁄Emission (nm): 754⁄776

Contents & storage

Store desiccated at -20°C.

Documents

Manuals & protocols