Fig. (6) Light microscopy of podocyte isolation procedure steps. A, B: Isolated glomeruli with light-brown magnetic Dynabeads^TM inside glomerular capillaries (asterisks in B). C, D: Isolated glomeruli after incubation  with a 10 mg/ml suspension of cationic colloidal silica-coated ferromagnetic nanoparticles (NPs) in coating  buffer and treatment with PAA. The NPs form a dense coating of the glomerular surface. E: Podocyte isolate  with podocytes (arrows) and free magnetic Dynabeads^TM(asterisks). F: Detail enlargement of an isolated  podocyte with NP’s on the cell surface (arrow). Note the primary processes of the podocyte. Native, unstained  preparations. Bars = 50 μm (A, C), 20 μm (B, D), 10 μm (E), 5 μm (F).