http://www.cd-bioparticles.com/p/Thiol-Magnetic-Particles_20_193_222_507.htmlAbsolute Mag™ Thiol Magnetic Particles (# WHM-N019) offer the flexibility to generate custom and functional magnetic beads with simple bioconjugation to desired molecules. The particles have strong magnetism, sensitivity and binding specificity. In addiition, magnetic separation is fast yet gentle, causing minimal disruption to your target proteins, permitting the isolation and preservation of labile compositions and conformations that might otherwise being interfered.