Protein Labeling Reagents

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

Greener Choice
Offers one or more environmental benefits itemized in the U.S. FTC “Green Guides.”

Learn More

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.

Atto 633 NHS Ester BioReagent, Suitable for Fluorescence, 90% (Coupling to Amines), MilliporeSigma™ Supelco™

Molecular Probes™ Alexa Fluor™ 488 5-SDP Ester (Alexa Fluor™ 488 Sulfodichlorophenol Ester)

Alexa Fluor™ 488 5-SDP ester (Alexa Fluor™ 488 sulfodichlorophenol ester)

Invitrogen™ Fluorescein-5-Maleimide

Alternative to fluorescein

Molecular Probes™ Iodoacetamide Azide

iodoacetamide azide

Molecular Probes™ Iodoacetamide Alkyne

Iodoacetamide Alkyne

Invitrogen™ BODIPY™ FL-X NHS Ester (Succinimidyl Ester)

BODIPY™ FL-X dye is bright, green fluorescent dye with similar excitation and emission to fluorescein (FITC) or Alexa Fluor™ 488 dye.

Invitrogen™ BODIPY™ TMR-X NHS Ester (Succinimidyl Ester)

BODIPY™ TMR-X dye is bright, orange fluorescent dye with similar excitation and emission to tetramethyrhodamine (TRITC) or Alexa Fluor™ 555 dye.

Invitrogen™ 2',7'-Difluorofluorescein (Oregon Green™ 488)

2',7'-difluorofluorescein (Oregon Green™ 488)

Invitrogen™ BODIPY™ FL-C₅ NHS Ester (Succinimidyl Ester)

BODIPY™ FL-C₅ dye is bright, green fluorescent dye with similar excitation and emission to fluorescein (FITC) or Alexa Fluor™ 488 dye.

Molecular Probes™ Biotin Alkyne (PEG4 carboxamide-Propargyl Biotin)

biotin alkyne (PEG4 carboxamide-propargyl biotin)

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.

Invitrogen™ Malachite Green isothiocyanate

malachite green isothiocyanate

Invitrogen™ NovaFluor™ Antibody Conjugation Kits

Get the most out of your panel design by conjugating antibodies to NovaFluor dyes specifically designed for spectral hygiene to have narrow emission spectra and minimal cross-laser excitation.

Invitrogen™ 5(6)-TAMRA (5-(and-6)-Carboxytetramethylrhodamine), mixed isomers

5(6)-TAMRA (5-(and-6)-Carboxytetramethylrhodamine), mixed isomers