http://www.cd-bioparticles.com/p/Protein-A-Magnetic-Particles_20_194_233_700.htmlAbsolute Mag™ Protein A Magnetic Particles, 15 nm (# WHM-G009) are covalently functionalized with Protein A, and can be used to bind IgG antibodies to the bead surface.Antibody/Protein Purification, Immunoprecipitation, Proteins/Ligands Immobilization