http://www.cd-bioparticles.com/p/Carboxyl-Magnetic-Particles_20_193_211_325.htmlAbsolute Mag Carboxyl Magnetic Particles, Ferromagnetic, Fluorescent Yellow, 5.0-5.9 μm (# WHM-S012) are prepared by either staining the polystyrene core of the particles with a solution of appropriate fluorophore or by polymerizing a fluorophore in styrene in the presence of polystyrene core particles. They can be used for covalent coupling of proteins or ligands or used as fluorescent tracers for cell surface markers in fluorescence microscopy and flow cytometry. In addition, chromium dioxide coated onto uniform polystyrene particles makes them retain magnetism once exposed to a magnetic field. Mechanotransduction Studying