Magnetophoresis and living cell imaging.

<p>(a) Schematic representation of cell magnetophoresis. <i>F_mag</i> and <i>F_vis</i> indicate the magnetic force and the viscous force. (b) (Top) Consecutive magnetophoresis images of two cells move at constant speed (Bottom) Fluorescence image, optical microscope image and the merged image of the two cells. Green, live cells expressed green fluorescent protein (GFP); Red, nucleic acid stained by propidium iodide (PI). The scale bar represents 20 µm. (c) Size distributions of distinctive cells (SKHep-1, HepG2 and HeLa). The red lines are the standard normal distribution. N = 200 cells.