http://www.cd-bioparticles.com/p/Amine-Magnetic-Particles_20_193_209_205.htmlAbsolute Mag™ Amine Magnetic Particles, 6.0-6.9 μm (# WHM-S023) are prepared by coating a layer of magnetite and polystyrene onto monodispersed polystyrene core beads. With the primary amino groups, they can be used to covalently couple proteins using bifunctional crosslinking agents for cell separation, affinity purification, DNA probe assays, magnetic bead EIA, etc.Proteins/Ligands Immobilization