Protein Labeling Reagents

Various reagents designed to selectively label target proteins. Products include classic dyes, radioisotope labels, biotinylation reagents, fluorescent labels, molecular probes, assays, and labeling kits.

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Invitrogen™ Fluorescein-5-Maleimide

Alternative to fluorescein

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Thermo Scientific™ FITC (5/6-fluorescein isothiocyanate), mixed isomer

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

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Specifications

Content And Storage	Store desiccated at -20°C, protect from moisture
Product Type	FITC
Label or Dye	FITC (Fluorescein)
Reactive Moiety	Isothiocyanate
Solubility	DMF (Dimethylformamide)
Emission	518
Excitation	494
Label Type	Classic Dyes
Chemical Reactivity	Amine
Product Line	Pierce

Thermo Scientific™ DyLight™ 488 NHS Ester

Label antibodies or other proteins as probes for fluorescence imaging assays with the full spectral range of NHS ester-activated DyLight Dyes.

Pricing & Availability
Specifications

Labeling Target	Proteins
Content And Storage	Store desiccated at -20°C, protected from light.
Product Type	Dye
Label or Dye	DyLight™ 488
Reactive Moiety	Active Ester, Succinimidyl Ester, NHS Ester
Solubility	DMF (Dimethylformamide)
Emission	518
Excitation	493
Label Type	DyLight Fluors
Chemical Reactivity	Amine
Product Line	DyLight

Thermo Scientific™ EZ-Link™ NHS-PEG12-Biotin, No-Weigh™ Format

Biotinylate protein amines and maximize solubility of proteins with this very long (56.0A) NHS-ester biotinylation reagent containing a pegylated, water-soluble spacer arm.

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Specifications

Label Type	Biotin & Analogs

Thermo Scientific™ EZ-Link™ NHS-SS-PEG4-Biotin

Biotinylate protein amines with this cleavable, long (37.9A) NHS-ester biotinylation reagent containing a reducible disulfide bond in the pegylated, water-soluble spacer arm.

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Invitrogen™ DNP-X, SE, 6-(2,4-Dinitrophenyl)aminohexanoic Acid, Succinimidyl Ester

DNP-X, SE, 6-(2,4-Dinitrophenyl)aminohexanoic Acid, Succinimidyl Ester

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Thermo Scientific™ DyLight™ 405 Maleimide

Label antibodies or other proteins as probes for fluorescence imaging assays with the full spectral range of maleimide-activated DyLight Dyes.

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Molecular Probes™ Alexa Fluor™ 750 C₅ Maleimide

Alexa Fluor™ 750 is a bright, near-infrared fluorescent dye with excitation ideally suited for the 633 nm laser line or dye-pumped laser excitation.

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Molecular Probes™ Alexa Fluor™ 350 C₅ Maleimide

Alexa Fluor™ 350 is a blue fluorescent dye with moderate photostability and excitation that matches the 350 nm laser line.

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

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.