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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 293 results
1

Invitrogen™ Alexa Fluor™ 488 5-TFP (Alexa Fluor™ 488 Carboxylic Acid, 2,3,5,6-Tetrafluorophenyl Ester), 5-isomer  DFS Item

Alexa Fluor™ 488 5-TFP (Alexa Fluor™ 488 Carboxylic Acid, 2,3,5,6-Tetrafluorophenyl Ester), 5-isomer

3

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

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

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
4

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).

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
5

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

Biotinylate protein amines with this doubly-long-chain (30.5A), NHS-ester biotinylation reagent containing a membrane permeable spacer arm for intracellular labeling.

6

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.

7

Thermo Scientific™ FL - EAB1 Peptide, 100μM  DFS Item

Contain known interaction motifs and are labeled with fluorescein

8

Thermo Scientific™ Pierce™ Iodination Beads

Easily and gently label (iodinate) proteins and peptides with iodine-125 using reagent-coated polystyrene beads that can be removed following reaction.

9

Invitrogen™ Alexa Fluor™ 633 Hydrazide  DFS Item

Alexa Fluor™ 633 Hydrazide is useful as a cell tracer and as a reactive dye for labeling aldehydes or ketones in polysaccharides or glycoproteins.

10

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

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

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
11

Thermo Scientific™ EZ-Link™ Alkoxyamine-PEG12-Biotin

Biotinylate glycoproteins (aldehydes of oxidized sugars) with a very long (55.4A), pegylated biotinylation reagent containing a 12-unit PEG spacer for length and solubility.

12

Invitrogen™ Biotin-4-Fluorescein  DFS Item

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.

14

Invitrogen™ Alexa Fluor™ 568 C5 Maleimide  DFS Item

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

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

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