Sulpho-NHS-LC-LC-Biotin, EZ-Link™, Pierce™

Supplier: LIFE TECHNOLOGIES MS

21338 A35358 21338
103523-934EA 274.46 USD
103523-934 CAPI21338 PI21338
Sulpho-NHS-LC-LC-Biotin, EZ-Link™, Pierce™
Sulfo-NHS-LC-LC-Biotin

Thermo Scientific EZ-Link Sulfo-NHS-LC-LC-Biotin enables simple and efficient biotin labeling of antibodies, proteins, and any other primary amine–containing macromolecules. Specific labeling of cell surface proteins is another common application for these uniquely water-soluble and membrane impermeable reagents.


  • Protein labeling—biotinylate antibodies to facilitate immobilization, purification or detection using streptavidin resins or probes
  • Cell surface labeling—biotinylates only surface proteins of whole cells because the negatively charged reagent does not permeate cell membranes
  • Amine-reactive—reacts with primary amines (-NH2), such as the side-chain of lysines (K) or the amino-termini of polypeptides
  • Soluble—charged sulfo-NHS group increases reagent water solubility compared to ordinary NHS-ester compounds
  • Irreversible—forms permanent amide bonds; spacer arm cannot be cleaved
  • Doubly long —spacer arm (total length added to target) is 22.4 angstroms; this extended arm helps to minimize steric hindrance for biotin binding


Thermo Scientific No-Weigh products are specialty reagents provided in a pre-aliquoted format. The pre-weighed packaging prevents the loss of reagent reactivity and contamination over time by eliminating the repetitive opening and closing of the vial. The format enables use of a fresh vial of reagent each time, eliminating the hassle of weighing small amounts of reagents and reducing concerns over reagent stability.


Sulfo-NHS-LC-LC-Biotin is the longest of three very similar EZ-Link Reagents that are water-soluble, non-cleavable, and enable simple and efficient biotinylation of antibodies, proteins and any other primary amine-containing macromolecules in solution. Specific labeling of cell surface proteins is another common application for these uniquely water-soluble and membrane impermeable reagents. Differing only in their spacer arm lengths, the three Sulfo-NHS-ester reagents offer the possibility of optimizing labeling and detection experiments where steric hindrance of biotin binding is an important factor.


Caution: For Research Use Only. Not for use in diagnostic procedures. Store desiccated at -5 to -30°C

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Specification Test Results

Product Type Sulfo-NHS-LC-LC-Biotin
Quantity 50 mg
Product Line EZ-Link™
Cell Permeability Cell-Impermeant
Chemical Reactivity Amine
Reactive Moiety Active Ester, Succinimidyl Ester, Sulfo-NHS Ester
Solubility DMF (Dimethylformamide), DMSO (Dimethylsulfoxide), Water
Label or Dye Biotin
Label Type Biotin & Analogs
Spacer Long
Spacer arm 22.4 angstroms

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