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™ Alexa Fluor™ 488 NHS Ester (Succinimidyl Ester)

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

Pricing and Availability
Specifications

Shipping Condition	Room Temperature
Content And Storage	Store in freezer (-5 to -30°C) and protect from light.
Product Type	Dye
Label or Dye	Alexa Fluor™ 488
Emission	517 nm
Excitation	494 nm
Label Type	Alexa Fluor
Chemical Reactivity	Amine
Product Line	Alexa Fluor

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.

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

Thermo Scientific™ EZ-Link™ Sulfo-NHS-Biotin is a short-chain, water-soluble biotinylation reagent for labeling antibodies, proteins and other molecules that have primary amines.

Pricing and Availability
Specifications

Cell Permeability	Cell-Impermeant
Product Type	Sulfo-NHS-Biotin
Spacer	Short
Label or Dye	Biotin
Solubility	DMF (Dimethylformamide),DMSO (Dimethylsulfoxide),Water
Chemical Reactivity	Amine
Product Line	EZ-Link

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

Pricing and Availability
Specifications

Label Type	Biotin & Analogs

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.

Pricing and Availability
Specifications

Cell Permeability	Cell-Impermeant
Product Type	Sulfo-NHS-LC-Biotin
Spacer	Mid-length
Label or Dye	Biotin
Solubility	DMF (Dimethylformamide),DMSO (Dimethylsulfoxide),Water
Chemical Reactivity	Amine
Product Line	EZ-Link

Invitrogen™ Fluorescein-5-Isothiocyanate (FITC 'Isomer I')

Fluorescein-5-Isothiocyanate (FITC 'Isomer I')

Pricing and Availability
Specifications

Shipping Condition	Room Temperature
Content And Storage	Store in freezer (-5 to -30°C) and protect from light.
Product Type	Fluorescein-5-Isothiocyanate
Label or Dye	FITC (Fluorescein)
Reactive Moiety	Isothiocyanate
Label Type	Classic Dyes
Chemical Reactivity	Amine

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

Thermo Scientific™ EZ-Link™ Sulfo-NHS-SS-Biotin No-Weigh™ Format is a water-soluble, NHS-ester biotinylation reagent whose spacer arm includes a cleavable disulfide bond for reversible labeling of proteins and cell surface primary amines.

Pricing and Availability
Specifications

Chemical Reactivity	Amine

Thermo Scientific™ Pierce™ Dye Removal Columns

Affinity resin with spin columns to quickly bind and remove excess fluorescent dye from antibody (protein) solutions following labeling reactions.

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

Alexa Fluor™ 405 is a blue-fluorescent dye optimal for use with the 405 nm violet laser.

Pricing and Availability
Specifications

Shipping Condition	Room Temperature
Product Type	Dye
Label or Dye	Alexa Fluor™ 405
Reactive Moiety	Active Ester, Succinimidyl Ester
Label Type	Alexa Fluor
Chemical Reactivity	Amine
Product Line	Alexa Fluor

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Invitrogen™ Click-iT™ Cell Reaction Buffer Kit

Clicks the two moieties together

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Invitrogen™ pHrodo™ Dyes for Amine Labeling

Amine-reactive and TFP ester pHrodo dyes enable accurate measurement of cell endocytosis and phagocytosis, with low signal-to-background, for use in live cell assays.