Protein Labeling Reagents

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 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 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 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 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 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 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.

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 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,...

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™ 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™ Pierce Iodination Beads are 3mm diameter polystyrene beads that are coated with an oxidizing reagent, which provides efficient activation of iodine-125 for protein or peptide iodination procedures.

Alexa Fluor™ 647 is a bright, far-red fluorescent dye with excitation ideally suited for the 594 nm or 633 nm laser lines. 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™ 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,...

Alexa Fluor™ 532 is a bright yellow dye with excitation ideally suited for the frequency-doubled Nd:YAG laser line. Used for stable signal generation in imaging and flow cytometry, Alexa Fluor™ 532 dye is water soluble and pH-insensitive from pH 4 to pH 10.