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Science  25 Nov 2011:
Vol. 334, Issue 6059, pp. 1051
DOI: 10.1126/science.334.6059.1051

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Summary

There are many mysteries that are likely to keep cell biologists working long hours. How does the cell know where it is? How do cells sense chemical gradients? How do they migrate together? How do newly synthesized proteins move across the membranes of the Golgi apparatus? What do the barrel-shaped protein particles dubbed vaults do? How do cells communicate with each other over long distances?

This article is part of the Mysteries in the Cell collection.