The apical junction complex of epithelial cells creates both a permeability barrier and cell polarity.
Features
polarity-generating protein complexes
PAR protein complexes
References
Anderson JM, Van Itallie CM, Fanning AS. Setting up a selective barrier at the apical junction complex. Curr Opin Cell Biol. 2004 Apr;16(2):140-5. PMID: 15196556