Protein Labeling Reagents

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

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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.

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

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

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

Thermo Scientific™ Vivid™ Red Fluorescent Standard  

Vivid™ Fluorescent Standards represent the products formed during oxidation of Vivid™ Substrates by cytochrome P450 enzymes.

Invitrogen™ Vivid™ Blue Fluorescent Standard  

Vivid™ Blue Fluorescent Standard

Molecular Probes™ Pacific Orange™ Succinimidyl Ester, Triethylammonium Salt  

Pacific Orange™ Succinimidyl Ester, Triethylammonium Salt

Molecular Probes™ pHrodo™ Green STP Ester  

pHrodo™ Green STP Ester

Molecular Probes™ pHrodo™ Red Maleimide  

pHrodo™ Red Maleimide

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.

Invitrogen™ R-Phycoerythrin  

R-Phycoerythrin

Thermo Scientific™ EZ-Link™ NHS-Desthiobiotin

Label intracellular proteins for affinity purification with streptavidin beads

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

Biotinylate reduced cysteines (-SH groups) at high pH via irreversible thioether bonds with this haloacetyl-activated, sulfhydryl-reactive biotinylation reagent.

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

Biotinylate glycoproteins (aldehydes of oxidized sugars) with this mid-length (24.7A) hydrazide-activated biotinylation reagent.

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.

Thermo Scientific™ EZ-Link™ Pentylamine-Biotin

Biotinylate proteins or surfaces using EDC or other amine-reactive crosslinkers with this short (18.9A) biotinylation reagent.