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Curr Opin Cell Biol. 2000 Aug;12(4):483-90.

Membrane traffic in polarized epithelial cells.

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Department of Anatomy, University of California, San Francisco, 94143-0452, USA.


Epithelial cells contain apical and basolateral surfaces with distinct compositions. Sorting of certain proteins to the basolateral surface involves the epithelial-specific mu 1b clathrin adaptor subunit. Recent results have shown that targeting to the basolateral surface utilizes the exocyst, whereas traffic to the apical surface uses syntaxin 3. Endocytosis at the apical surface is regulated by ARF6. Transcytosis of IgA is regulated by the p62Yes tyrosine kinase.

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