Protein Labeling Reagents

Molecular Probes™ pHrodo™ Green STP Ester  

pHrodo™ Green STP Ester

Invitrogen™ Rhodamine Red™-X, Succinimidyl Ester, 5-isomer  

Rhodamine Red™-X, Succinimidyl Ester, 5-isomer

Invitrogen™ Alexa Fluor™ 594 Hydrazide, for microinjection  

Alexa Fluor™ 594 Hydrazide is useful as a cell tracer and as a reactive dye for labeling aldehydes or ketones in polysaccharides or glycoproteins.

Invitrogen™ Alexa Fluor™ 488 C₅ Maleimide  

Alexa Fluor™ 488 is a bright, green fluorescent dye with excitation ideally suited to the 488 nm laser line.

Invitrogen™ Alexa Fluor™ Plus Amine-Reactive Dyes

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Discover Alexa Fluor Plus amine-reactive dyes, the next-generation fluorescent labeling solution. Engineered to minimize nonspecific staining and enhance signal-to-noise ratios, these dyes ensure precise detection of low-abundance targets. Achieve bright, reliable imaging with reduced background interference.

Invitrogen™ 5(6)-SFX (6-(Fluorescein-5-(and-6)-Carboxamido) Hexanoic Acid, Succinimidyl Ester), mixed isomers  

5(6)-SFX (6-(Fluorescein-5-(and-6)-Carboxamido) Hexanoic Acid, Succinimidyl Ester), mixed isomers

Thermo Scientific™ Fluorescein-5-Maleimide

Activated derivatives of green-fluorescent fluorescein dye to label antibodies, proteins and other molecules for fluorescence imaging (ex 494; em 518).

Thermo Scientific™ EZ-Link™ Sulfo-NHS-LC-Biotin

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.

Invitrogen™ Alexa Fluor™ 647 C₂ Maleimide

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

Thermo Scientific™ EZ-Link™ NHS-Biotin

Biotinylate protein amines (e.g., lysines) with a simple, short (13.5A), NHS-ester biotinylation reagent containing a membrane-permeable spacer arm for intracellular labeling.

Molecular Probes™ Alexa Fluor™ 488 Azide (Alexa Fluor™ 488 5-Carboxamido-(6-Azidohexanyl), Bis(Triethylammonium Salt)), 5-isomer  

The green-fluorescent Alexa Fluor™ 488 azide is reactive with terminal alkynes via a copper-catalyzed click reaction.

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

Biotinylate glycoproteins (aldehydes of oxidized sugars) with this mid-length (24.7A) hydrazide-activated biotinylation reagent.

Molecular Probes™ Iodoacetamide Alkyne  

Iodoacetamide Alkyne

Invitrogen™ 4-Acetamido-4'-Maleimidylstilbene-2,2'-Disulfonic Acid, Disodium Salt  

4-acetamido-4'-maleimidylstilbene-2,2'-disulfonic acid, disodium salt

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