Single‐molecule tracking in living cells.

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Single‐molecule tracking in living cells. Single‐molecule tracking in living cells. (A) Cy3–NGF (nerve growth factor) bound to the surface of a PC12 cell. The white line delineates the shape of the cell. (B) Single‐molecule trajectories of the receptor–ligand (Cy3–NGF) complex on the cell surface. The movement of the complex displayed repeated alternation between mobile and immobile phases. During immobile phases (yellow circles), the complex formed clusters with other complexes (red trajectories). Yasushi Sako Mol Syst Biol 2006;2:56 © as stated in the article, figure or figure legend