Molecular motors, built from proteins, are a kind of transport service that keep us functioning by trafficking essential chemical packages throughout the cell. To understand how molecular motors work, some researchers are creating animations. Here, each “leg” of a molecular motor called dynein moves as it progresses along a cellular structure called a microtubule. New data—collected by a team led by Samara Reck-Peterson and published online Jan. 8, 2012, in “Nature Structural & Molecular Biology”—suggest that dynein’s walk is even stranger than the one modeled.
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