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Protein Labeling Reagents
Browse our extensive selection of protein labeling reagents designed to selectively label target proteins. Our catalog includes a wide range of products such as classic dyes, biotinylation reagents, fluorescent labels, molecular probes, and labeling kits. These reagents are suitable for various protein modification and detection applications in research and biotechnology.Our collection features popular fluorescent dyes like Alexa Fluor, DyLight, and pHrodo dyes, as well as coumarin dyes and click chemistry labels. Biotinylation reagents, including various EZ-Link products, are available for protein purification and detection.These protein labeling reagents are designed to facilitate specific labeling of target proteins through various chemical reactivities, including amine, thiol, aldehyde, and click chemistry reactions. Many products offer water-soluble options and spacer arms of different lengths to optimize labeling efficiency and maintain protein function. Learn more about protein labeling reagents or methods.
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Alexa Fluor™ 647 is a bright and photostable far-red dye with excitation ideally suited to the 633 nm laser line.
Alexa Fluor™ 488 is a bright, green-fluorescent dye with excitation ideally suited for the 488 nm laser line.
Thermo Scientific™ EZ-Link NHS-Biotin is the simplest NHS-ester activated biotinylation reagent for labeling primary amines (e.g., protein lysines), whose membrane permeability enables it to be used for general intracellular labeling.
Thermo Scientific™ EZ-Link NHS-LC-Biotin is a long-chain, NHS-ester activated biotinylation reagent for labeling primary amines (e.g., protein lysines), whose membrane permeability enables it to be used for general intracellular labeling.
Thermo Scientific™ EZ-Link Sulfo-NHS-LC-Biotin is an intermediate-length, water-soluble biotinylation reagent for labeling antibodies, proteins and other molecules that have primary amines.
Alexa Fluor™ 488 is a bright, green fluorescent dye with excitation ideally suited to the 488 nm laser line.
Alexa Fluor™ 555 is a bright orange dye. Used for stable signal generation in imaging and flow cytometry, Alexa Fluor™ 555 dye is water soluble and pH-insensitive from pH 4 to pH 10.
Thermo Scientific™ EZ-Link NHS-PEG12-Biotin is very long, pegylated biotinylation reagent for simple and efficient biotin labeling of antibodies, proteins and other primary amine-containing macromolecules.
Thermo Scientific™ EZ-Link Sulfo-NHS-LC-LC-Biotin is a long-chain biotinylation reagent for labeling antibodies, proteins and other molecules that have primary amines. Additional Information and Online Ordering
Thermo Scientific™ FITC and Fluorescein Labeling Reagents and Kits are high-performance derivatives of fluorescein dye, activated for easy and reliable labeling of antibodies, proteins and other molecules for use as fluorescent probes.
Thermo Scientific™ Sulfhydryl-Reactive DyLight Dyes are maleimide-activated DyLight Fluors for fluorescent labeling of antibodies and other proteins to be used as probes for cellular imaging and other fluorescence detection methods.
Perform cell internalization studies with low signal-to-background and high specificity using the pHrodo pH sensor dyes, including pHrodo Red, Green, and Deep Red dyes. These dyes can be conjugated to biomolecules such as antibodies, and become highly fluorescent only when found in acidic...
Thermo Scientific™ EZ-Link Iodoacetyl-LC-Biotin is a mid-length, haloacetyl-activated, sulfhydryl-reactive biotinylation reagent that forms stable, irreversible thioether bonds at alkaline pH.
Thermo Scientific™ EZ-Link Pentylamine-Biotin is biotin that has been conjugated to pentylenediamine to add a short, amine-terminated spacer to its valeric acid group, providing a simple amine-modified compound for different applications.
Alexa Fluor™ 790 is a bright and photostable near-IR dye that is spectrally similar to indocyanine green (ICG) and the IRDye™ 800 dye.
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Protein labeling reagents are reactive dyes that attach to a specific functional group (i.e., amine or thiol) on a target biomolecule allowing for its subsequent detection or purification. Use the Protein Labeling Reagents Selection Tool to find the best reactive dye for your application or learn...
Use this interactive selection guide to find the right protein labeling reagent for your experiment. Step 1: Choose your options. Simply select the features you need from the options listed. As you define your parameters the list of available reagents matching your selection will appear in the panel...
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Can proteins in a gel be transferred to a membrane after the gel has been labeled using the No-Stain Protein Labeling Reagent?
How does the No-Stain Protein Labeling Reagent work?