Protein Labeling Reagents

Alexa Fluor™ 647 NHS Ester (Succinimidyl Ester) Invitrogen™

Alexa Fluor™ 647 is a bright and photostable far-red dye with excitation ideally suited to the 633 nm laser line. Used for stable signal generation in imaging and flow cytometry, Alexa Fluor™ 647 dye is water soluble and pH-insensitive from pH 4 to pH 10.

Alexa Fluor™ 488 NHS Ester (Succinimidyl Ester) Invitrogen™

Alexa Fluor™ 488 is a bright, green-fluorescent dye with excitation ideally suited for the 488 nm laser line. Used for stable signal generation in imaging and flow cytometry, Alexa Fluor™ 488 dye is water soluble and pH-insensitive from pH 4 to pH 10.

Alexa Fluor™ 488 C₅ Maleimide Invitrogen™

Alexa Fluor™ 488 is a bright, green fluorescent dye with excitation ideally suited to the 488 nm laser line. Used for stable signal generation in imaging and flow cytometry, Alexa Fluor™ 488 dye is water soluble and pH-insensitive from pH 4 to pH 10.

BODIPY™ FL NHS Ester (Succinimidyl Ester) Invitrogen™

BODIPY™ FL dye is bright, green fluorescent dye with similar excitation and emission to fluorescein (FITC) or Alexa Fluor™ 488 dye. It has a high extinction coefficient and fluorescence quantum yield and is relatively insensitive to solvent polarity and pH change.

Alexa Fluor™ 488 Carboxylic Acid, tris(triethylammonium) salt Invitrogen™

Alexa Fluor Carboxylic Acid tris(triethylammonium) salts are non-reactive, free acid forms of Alexa Fluor dyes. These carboxylic acid derivatives can be converted to an amine-reactive ester using standard chemical techniques or coupled to hydrazines, hydroxylamines, and amines in aqueous solution...

Alexa Fluor™ 594 NHS Ester (Succinimidyl Ester) Invitrogen™

Alexa Fluor™ 594 is a bright red dye. Used for stable signal generation in imaging and flow cytometry, Alexa Fluor™ 594 dye is water soluble and pH-insensitive from pH 4 to pH 10. In addition to reactive dye formulations, we offer Alexa Fluor™ 594 dye conjugated to a variety of antibodies, peptides,...

Alexa Fluor™ 405 NHS Ester (Succinimidyl Ester) Invitrogen™

Alexa Fluor™ 405 is a blue-fluorescent dye optimal for use with the 405 nm violet laser. Used for stable signal generation in imaging and flow cytometry, Alexa Fluor™ 405 dye is water soluble and pH-insensitive from pH 4 to pH 10.

pHrodo™ Dyes for Amine Labeling Invitrogen™

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...

Alexa Fluor™ 555 NHS Ester (Succinimidyl Ester) Invitrogen™

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. In addition to reactive dye formulations, we offer Alexa Fluor™ 555 dye conjugated to a variety of antibodies,...

Fluorescein-5-Maleimide Thermo Scientific™

Thermo Scientific Fluorescein-5-Maleimide is a high-performance derivative of fluorescein dye, activated for easy and reliable labeling of antibodies, proteins and other molecules for use as fluorescent probes.

EZ-Link™ Sulfo NHS-LC-LC-Biotin, No-Weigh™ Format Thermo Scientific™

Thermo Scientific EZ-Link Sulfo-NHS-LC-LC-Biotin enables simple and efficient biotin labeling of antibodies, proteins, and any other primary amine–containing macromolecules. Specific labeling of cell surface proteins is another common application for these uniquely water-soluble and membrane...

EZ-Link™ NHS-Desthiobiotin Thermo Scientific™

Thermo Scientific EZ-Link NHS-Desthiobiotin is a short, membrane permeable, amine-reactive labeling reagent whose biotin-like group is elutable from streptavidin, making it ideal for intracellular protein labeling and purification.

EZ-Link™ NHS-Biotin Thermo Scientific™

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.

EZ-Link™ Iodoacetyl-PEG2-Biotin Thermo Scientific™

Thermo Scientific EZ-Link Iodoacetyl-PEG2-Biotin is a mid-length, haloacetyl-activated, sulfhydryl-reactive biotinylation reagent that contains a 2-unit ethylene glycol in its spacer arm for increased water-solubility characteristics.

EZ-Link™ Iodoacetyl-LC-Biotin Thermo Scientific™

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. Features of EZ-Link Iodoacetyl-LC-Biotin: • Protein labeling—biotinylate antibodies or other proteins for...