http://www.cd-bioparticles.com/p/Chitosan-Magnetic-Particles_20_193_212_567.htmlAbsolute Mag™ Chitosan Magnetic Particles, Silica, 0.75 μm (# WHM-C057) allow the convenient and efficient covalent binding of bioaffine ligands. This is a unique product particularly can be used for separation of peptides and enzymes and selective binding of metal ions.Antibody/Protein Purification, Proteins/Ligands Immobilization