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Thermo Scientific™ EZ-Link™ NHS-PEG4-Biotin and Labeling Kits

Biotinylate protein amines and maximize solubility of proteins with this long (29.0A) NHS-ester biotinylation reagent containing a pegylated, water-soluble spacer arm.

Manufacturer: thermo scientific™  21455

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Catalog No. PI21455

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Description & Specifications


PEGylated Yes
Chemical Reactivity Amine
Membrane Permeable No
Water Soluble Yes
Sufficient For 8 labeling reactions, each with 1 to 10mg of antibody
Kit Contents Avidin, 10mg
Quantity 8 rxn kit
Cleavable No
Spacer Arm Length 29
Storage Requirements Store in original bottle at 4°C with desiccant
Description EZ-Link NHS-PEG4 Biotinylation Kit
Formulation Multi-component kit with NHS-PEG4-Biotin
Molecular Weight 588.67

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.


  • Water-soluble polyethylene glycol (PEG) spacer arm increases solubility of labeled protein
  • Prevents aggregation of antibodies better than Sulfo-NHS-LC-Biotin
  • Labels at N-terminus or lysine residues in less than 1 hour
  • Thermo Scientific No-Weigh Packaging (8 x 2mg) saves time - preserves reagent activity and prevents cross-contamination between use