Gap junction distribution in the auditory and vestibular sensory epithelium. Contrasting projection views of immunofluorescent cCx30 gap junction plaques in the lumenal (middle) and basal (right) ends of supporting cells of the distal (a) and the proximal (b) regions of the basilar papilla (Bp), and the extrastriolar region (c) of the utricular macula (Ut). The left panel shows the respective surface views of phalloidin-labeled hair cells. Scale bar, 10 μm.