MonoMag Maleimide Beads

MonoMag Maleimide Beads are activated magnetic beads in lyophilized powder form. The maleimide activated surface allows covalent bond formation to antibodies, proteins, peptides or other biomolecules via thiol (SH) groups. Oligonucleotides, antibodies or other ligands with thiol groups can be easily coupled to the beads. Attribute to their uniform size, narrow size distribution, short magnetic separation time, and unique surface coating, MonoMag Maleimide Beads exhibit rapid binding chemistry and low non-specific binding of protein or nucleic acids.

Ocean NanoTech’s MonoMag Maleimide Beads are also available in an easy-to-use kit format, allowing researchers to conjugate antibodies, proteins, peptides or other biomolecules of their own choice to these magnetic beads. With the engineered MonoMag Maleimide Beads and the specifically formulated conjugation buffers, the resulting conjugates exhibit high binding capacity and low non-specific binding. Kit contains sufficient reagents & components for performing at least 5 conjugation reactions. Briefly, the maleimide beads are mixed in thiol-containing molecules such as protein, nuleic acid or small molecules in coupling buffer for 2 hours, then quenching buffer will be added to the solution for 30 min to stop the reaction. After magnetic separation to remove unreacted the molecules, the conjugated beads are stored in storage buffer. The recommended protocol has been used to successfully conjugate bovine serum albumin, streptavidin or immunoglobulin to these magnetic beads. Please visit MonoMag Maleimide Beads Conjugation Kit for more details.


  • Narrow size distribution, CV≤5%; Significantly low non-specific binding to proteins and nucleic acid
  • High binding capacity
  • Immediate and gentle coupling at room temperature and neutral to low pH
  • No iron exposure to ensure lowest autosignal, particularly with respect to chemiluminescence
  • Easy to use


  • Immunoassay
  • Immunoprecipitation
  • Nucleic acid hybridization
  • Western blot
  • Cell separation
Product ID Product Name Pricing
Catalog # Product Name Unit Size Unit Price
MM1000-10 MonoMag Maleimide Beads, 1 µm 10 mg $279.00 Add to Cart
Catalog # Product Name Unit Size Unit Price
MM3000-50 MonoMag Maleimide Beads, 3 µm 50 mg $449.00 Add to Cart
Catalog # Product Name Unit Size Unit Price
MM4500-50 MonoMag Maleimide Beads, 4.5 µm 50 mg $449.00 Add to Cart
  • Weight Percentage: 5%
  • Magnetic Content: ~35% (1 µm), ~25% (3 µm), ~18% (4.5 µm)
  • Size: 1 µm – 4.5 µm
Product Name MonoMag Maleimide Beads
Shipping Condition Ice Pack
Storage and Stability -20 °C

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