Probably plays a role in the formation and regulation of the tight junction (TJ) paracellular permeability barrier.
Cell junction, tight junction . Localizes to the apical junction complex composed of tight and adherens junctions (By similarity). Colocalizes with SPEF1 at sites of cell-cell contact in intestinal epithelial cells (PubMed:12023291). .
Localized on the cytoplasmic face of tight junctions of polarized epithelia and some endothelia. Expressed in pancreas, kidney, liver and lung, but not in skeletal muscle, placenta, brain or heart.
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