http://www.cd-bioparticles.com/p/NHS-activated-Magnetic-Particles_20_193_218_765.htmlThe superparamagnetic particles consist of a matrix of carboxylated polyvinyl alcohol, which is subsequently activated with N-hydroxysuccinimidyl (NHS) ester functionalities and can therefore be used for direct coupling to proteins or other ligands with amino-functionalities.Antibody/Protein Purification, Immunoassay, Proteins/Ligands Immobilization