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Thermo Scientific™ EZ-Link™ Maleimide-PEG2-Biotin

Biotinylate reduced cysteines with this short, maleimide-activated, sulfhydryl-reactive biotinylation reagent containing a 2-unit PEG spacer arm to enhance water solubility.

Manufacturer: thermo scientific™  PI21902BID

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Catalog No. PI21902

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Description & Specifications


Chemical Reactivity Sulfhydryl
Description EZ-Link Maleimide-PEG2-Biotin, No-Weigh Format
PEGylated Yes
Quantity 8 x 2mg
Water Soluble Yes
Formulation Maleimide-activated biotin with diethyleneglycol spacer
Membrane Permeable No
Spacer Arm Length 29.1
Cleavable No
Molecular Weight 525.62
Sufficient For 8 uses to label a total of 203mg of IgG using typical conditions

Thermo Scientific™ EZ-Link Maleimide-PEG2-Biotin is a mid-length, maleimide-activated, sulfhydryl-reactive biotinylation reagent that contains a 2-unit ethylene glycol in its spacer arm for increased water-solubility characteristics.


  • Water-soluble; contains polyethylene glycol (PEG) spacer arm
  • Reacts with sulfhydryl (-SH) groups at acidic to neutral pH
  • Transfers hydrophilic PEG spacer arm to final conjugate
  • Forms a thioether bond