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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 – 15 of 298 results
1

Thermo Scientific™ Alexa Fluor™ 420 NHS Ester (Succinimidyl Ester)
GREENER_CHOICE

Alexa Fluor 420 NHS Ester is an amine-reactive dye optimized for multiplex IHC and spatial biology. A long Stokes shift and 420/500 ex/em make it a good match for the CFP filter.

4

MilliporeSigma™ Novagen™ D-Desthiobiotin

Provides elution of Strep·Tag™ II proteins from biotin-binding site of Strep·Tactin™ resins

5

Bolton-Hunter Reagent, Thermo Scientific Chemicals

CAS: 34071-95-9 Molecular Formula: C13H13NO5 Synonym: N-Succinimidyl-3-(4-hydroxyphenyl)propionate; Rudinger reagent

CAS 34071-95-9
Synonym N-Succinimidyl-3-(4-hydroxyphenyl)propionate; Rudinger reagent
Molecular Formula C13H13NO5
8

Invitrogen™ Biotin-4-Fluorescein

Biotin-4-fluorescein can be used to quantitate available biotin-binding sites or the concentration of avidin or streptavidin through the strong quenching associated when this molecule binds to avidin.

9

Invitrogen™ Alexa Fluor™ Plus Amine-Reactive Dyes

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
10

Molecular Probes™ 7-Amino-4-Methylcoumarin, reference standard

7-Amino-4-methylcoumarin (AMC) can be used as a fluorescence reference standard for AMC-based enzyme substrates including AMC-based caspase substrates. | 175.2 g/mol

11

Invitrogen™ Alexa Fluor™ 660 NHS Ester (Succinimidyl Ester)

Alexa Fluor™ 660 is a bright and photostable far-red dye with excitation ideally suited to the 633 or 647 nm laser line.

12

Invitrogen™ Alexa Fluor™ 546 NHS Ester (Succinimidyl Ester)

Alexa Fluor™ 546 is a bright yellow dye. Used in imaging and flow cytometry, Alexa Fluor™ 546 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™ 546
Reactive Moiety Active Ester, Succinimidyl Ester
Emission 570 nm
Excitation 554 nm
Label Type Alexa Fluor
Chemical Reactivity Amine
Product Line Alexa Fluor™
13

Invitrogen™ Alexa Fluor™ 700 NHS Ester (Succinimidyl Ester)

Alexa Fluor™ 700 is a bright and photostable near-IR dye that can be excited with a xenon-arc lamp, far-red diode lasers, or dye pumped lasers operating in the 675–700 nm range.

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™ 700
Reactive Moiety Active Ester, Succinimidyl Ester
Emission 723 nm
Excitation 702 nm
Label Type Alexa Fluor
Chemical Reactivity Amine
Product Line Alexa Fluor™
14

Invitrogen™ Alexa Fluor™ 568 C5 Maleimide

Alexa Fluor™ 568 is a bright, orange/red fluorescent dye with excitation ideally suited for the 568 nm laser line on the Ar-Kr mixed-gas laser.

15

Invitrogen™ Alexa Fluor™ 660 C2 Maleimide

Used for stable signal generation in imaging and flow cytometry, Alexa Fluor™ 660 dye is water soluble and pH-insensitive from pH 4 to pH 10.