Thermo Scientific DyLight 650 Amine-Reactive Dye is an NHS ester-activated derivative of high-performance DyLight 650 used to fluorescently label antibodies and other proteins that are then used as molecular probes for cellular imaging and other fluorescence detection methods.
DyLight 650 provides vibrant far-red fluorescence with comparable or improved performance over other dyes, including Alexa Fluor™ 647 and Cy5™ dye, for fluorescent applications.The high water solubility of DyLight Fluors means that a high dye-to-protein ratio can be attained without causing precipitation of the conjugates. DyLight 650 Amine-Reactive Dye is available as a stand-alone reagent or as part of two antibody labeling kit sizes.
- High performance – DyLight 650 fluoresces brighter than Alexa Fluor 647 and Cy5
- Specific – NHS ester-activated dye labels proteins and other molecules at primary amines (-NH2)
- Convenient kit sizes – standard and microscale sizes are offered to match your experimental needs
- Optimized procedure – following the standard protocol results in antibodies with excellent dye:protein ratios and recovery rates for optimum activity and fluorescence labeling
- Primary antibody labeling for immunofluorescence microscopy, immunohistochemistry (IHC), Western blotting or ELISA assay
- Target protein labeling for in vitro and in vivo fluorescent detection strategies
|Immunofluorescence microscopy using DyLight 650 dye. Intermediate filaments (red) in A549 cells were fluorescently labeled with biotinylated mouse anti-cytokeratin 18 antibody and DyLight 650-Conjugated Streptavidin. Nuclei were labeled with Hoechst dye.
DyLight 650 Amine-Reactive Dye is activated with an N-hydroxysuccinimide (NHS) ester moiety to react with exposed N-terminal α-amino groups or the ε-amino groups of lysine residues to form stable amide bonds. Learn more about NHS ester chemistry.
Typical labeling reactions require the dye to first be dissolved in anhydrous dimethyl formamide (DMF) or another suitable organic solvent before adding a specific molar amount of dye to an amine-free buffer containing the protein to be labeled. However, the high solubility of DyLight Fluors permits protein solutions to be added directly to specific amounts of the labeling reagent. This feature allows DyLight 650 Amine-Reactive Dye to be provided in multiple formats with flexible protocols to achieve efficient degrees of labeling.
We also offer Standard and Microscale DyLight 650 Antibody Labeling Kits for fast and efficient fluorescent labeling of antibodies for use in fluorescence methods.The standard size kit contains all necessary components to perform three separate labeling reactions using 1mg of IgG or similar quantities of other proteins. The microscale kit contains all of the necessary components to perform five separate labeling reactions using 100µg of IgG. Both kit sizes include the Amine-Reactive DyLight 650 NHS-ester in convenient single-use vials as well as purification resin and spin columns for the preparation of ready-to-use conjugate.
|Procedure summary for DyLight 650 Antibody Labeling Kits. The protocol is simple and provides efficient labeling, exceptional clean-up and excellent antibody recovery.
|DyLight Antibody Labeling Kits provide outstanding recovery. The percent recovery for DyLight Antibody Labeling Kits is the average for 16 labeling reactions using three different antibodies. The percent recovery for DyLight Microscale Antibody Labeling Kits is the average for 13 labeling reactions using three different antibodies.
DyLight 650 Fluorophore Overview Page
Complete DyLight Fluor Product Guide
All Fluorescent Labeling Reagents and Kits
DyLight Fluor Secondary Antibody Conjugates
DyLight Fluor Streptavidin and NeutrAvidin Conjugates
DyLight 650 Azide-Reactive Dye – phosphine-activated fluorescent dye for Staudinger ligation
Krypton Fluorescent Protein Stains