A typical example of dextran-FITC staining in a normal organ of Corti. All intercellular junctions among the sensory and supporting cells lack dextran-FITC fluorescence (40 kDa), except for the junctions between the inner pillar and inner hair cells, where a sporadic accumulation of dextran-FITC fluorescence is present (arrows). Outer hair cells display weak fluorescence in the cytoplasm (double-arrows). IHC: Inner hair cells. PC: Pillar cells. OHC1, OHC2 and OHC3: The first, second, and third row of outer hair cells, respectively. Bar = 25 μm.