http://www.cd-bioparticles.com/p/Protein-L-Magnetic-Particles_20_194_235_430.htmlAbsolute Mag Protein L Magnetic Particles, 100 nm (# WHM-X042) are high-capacity and high-throughput affinity particles for antibody purification and immunoprecipitation methods. The protein L is covalently attached to the magnetic particle surface, which can bind to mouse and human antibodies through kappa light chains and enable purification of monoclonal antibodies in cell culture supernantants supplemented with bovine serum.Antibody/Protein Purification