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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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1

Invitrogen™ Alexa Fluor™ Plus Amine-Reactive Dyes
GREENER_CHOICE

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.

Labeling Target Primary amines
Content And Storage -25°C to 8°C
Format Amine-reactive dye
Product Type Amine-reactive Dye
Formulation Solid
Solubility DMSO
Label Type Alexa Fluor
Product Line Alexa Fluor
Detection Method Fluorescence
2

Invitrogen™ Dabcyl, SE, 4-((4-(dimethylamino)phenyl)azo)benzoic Acid, Succinimidyl Ester  DFS Item

4-((4-(dimethylamino)phenyl)azo)benzoic acid, succinimidyl ester (dabcyl, SE)

3

Thermo Scientific™ Pierce™ Premium Grade Sulfo NHS-SS-Biotin

Biotin-label antibodies or other proteins and biomolecules in applications where product integrity and risk minimization are paramount with Thermo Scientific™ Pierce™ Premium Grade Sulfo-NHS-SS-Biotin, a high-quality formulation of this amine-reactive, cleavable biotinylation reagent.

Cell Permeability Cell-Impermeant
Product Type Sulfo NHS-SS-Biotin
Spacer Mid-length, Cleavable
Label or Dye Biotin
Solubility DMF (Dimethylformamide),DMSO (Dimethylsulfoxide),Water
Reactive Moiety Active Ester, Succinimidyl Ester, Sulfo-NHS Ester
Label Type Biotin & Analogs
Chemical Reactivity Amine
Product Line Pierce
4

Invitrogen™ LysoLight™ sDBCO Reagents

LysoLight sDBCO reagents are engineered for use with SiteClick Duet and Quartet antibody labeling kits. They offer robust and reproducible conjugation without compromising antibody-target affinity.

Shipping Condition Ambient
Content And Storage -25°C to +8°C
Solubility DMSO (Dimethylsulfoxide)
Labeling Method Click Chemistry
Green Features Enhanced stability
For Use With (Application) SiteClick Antibody Labeling
Chemical Reactivity Azide
Detection Method Fluorescence
Labeling Target Azido Modified Antibodies
For Use With (Equipment) Flow Cytometer, Fluorescence Microscope, High Content Analysis Instrument
Product Type Reactive Dye
Reactive Moiety sDBCO alkyne
Label Type LysoLight
Product Line LysoLight
6

Molecular Probes™ pHrodo™ Red, succinimidyl ester (pHrodo™ Red, SE)  DFS Item

New pH-sensitive pHrodo™ Red dye conjugates give faster and more accurate results than any other phagocytosis assay.

7

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

Thermo Scientific™ EZ-Link™ NHS-PEG4-Biotin is a pegylated, water-soluble reagent for simple and efficient biotin labeling of antibodies, proteins and other primary amine-containing macromolecules.

Cell Permeability Cell-Impermeant
Content And Storage Store at -20°C.
Product Type NHS-PEG4-Biotin
Label or Dye Biotin
Solubility DMF (Dimethylformamide),DMSO (Dimethylsulfoxide),Water
Chemical Reactivity Amine
Product Line EZ-Link
9

Molecular Probes™ Alexa Fluor™ 790 NHS Ester (Succinimidyl Ester)  DFS Item

Alexa Fluor™ 790 is a bright and photostable near-IR dye that is spectrally similar to indocyanine green (ICG) and the IRDye™ 800 dye.

10

Invitrogen™ Alexa Fluor™ 488 C5 Maleimide  DFS Item

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

13

Thermo Scientific™ EZ-Link™ Maleimide-PEG2-Biotin, No-Weigh™ Format

Biotinylate reduced cysteines with this short, maleimide-activated, sulfhydryl-reactive biotinylation reagent containing a 2-unit PEG spacer arm to enhance water solubility.

Cell Permeability Cell-Impermeant
Product Type Maleimide-PEG2-Biotin
Label or Dye Biotin
Solubility DMF (Dimethylformamide),DMSO (Dimethylsulfoxide),Water
Reactive Moiety Maleimide
Chemical Reactivity Thiol
Product Line EZ-Link
14

Invitrogen™ Alexa Fluor™ 405 Cadaverine  DFS Item

Alexa Fluor™ 405 Cadaverine is useful as a polar tracer and as a reactive dye for labeling proteins via a carboxylic acid moiety.

15

Invitrogen™ Alexa Fluor™ 568 NHS Ester (Succinimidyl Ester)  DFS Item

Alexa Fluor™ 568 is a bright orange dye. Used for stable signal generation in imaging and flow cytometry, Alexa Fluor™ 568 dye is water soluble and pH-insensitive from pH 4 to pH 10.

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™ 568
Reactive Moiety Active Ester, Succinimidyl Ester
Emission 602 nm
Excitation 578 nm
Label Type Alexa Fluor
Chemical Reactivity Amine
Product Line Alexa Fluor