Abstract
Targeted trafficking of vesicles, RNA, mitochondria, and many other organelles in cells requires the coordinated activity of myosin, dynein, and kinesin molecular motors. Our understanding of these motors has progressed rapidly due to advances in biochemistry, structural biology, single-molecule force measurements, and super-resolution optical tracking in vitro (1–3). Two articles in the Biophysical Journal—one previously published (4) and one in this issue (5)—report advances in high-resolution tracking of the nanometer-scale motions of myosin V in live cells.
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