What makes epithelial cells polarized?
Crumbs, Yurt and the establishment and maintenance of epithelial polarity
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How do cells remain stuck to each other in a sheet?
alpha catenin as a physical link between the actomyosin cytoskeleton and the adherens junction
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How do epithelial cells escape from their sheet in order to migrate?
Neuroblast ingression as a model for epithelial to mesenchymal transition (EMT)