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Maleimide Activated BSA HL

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This is a replacement product for CM52103. 

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Product Sheet



CellMosaic’s maleimide activated bovine serum albumin (also known as BSA or "Fraction V") HL is designed for direct conjugation of BSA with proteins, peptides, or other ligands containing free sulfhydryl groups for use in immunization. This product consists of a highly loaded BSA that has been modified with EMCS (N-(Ɛ-maleimidocaproyloxy) succinimide ester) to attach 20-30 maleimide groups per BSA molecule.  

This product replaces previously developed maleimide activated BSA HL (Part No: CM52103) and incorporate a slightly longer linker and more suitable for immunization. The product is also more stable for labeling reactions.


  • Suitable for loading large number of Cys peptides and other hydrophilic thiol antigens onto BSA for antibody production.

Key Features of this Maleimide Activated BSA

  • Lyophilized powder and ready for conjugation reaction after reconstitution with water, no need for external buffer.
  • High loading with 20-30 average maleimide groups per BSA.

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