Tosyl magnetic particles are magnetic beads coated with a high density of tosyl functional groups on the surface. Tosyl magnetic particles are ideal for protein isolation due to their size and surface chemistry. Any ligand (e.g. antibody, protein, peptide or glycoprotein) containing amino or sulfhydryl groups can be covalently coupled to the particle surface. These particles are also an excellent choice for cell separation applications. CD Bioparticles is the leading manufacturer and supplier of Tosyl Magnetic Particles for R&D and commercialization in a wide variety of application areas.