Expression of IP3 receptors (IP3Rs) in the cochlear sensory epithelium. (A, B) Immunofluorescence labeling for IP3R in the cochlear sensory epithelium. (C to F) Expression of IP3Rs in the cochlear-supporting cells. Labeling is visible on the cell surface, in the cytosol, and on the nuclear membrane. Asterisks in E indicate lipid bubbles in Hensen cells that have no IP3R labeling. Scale bars=50 μm (A, B); 20 μm (C, D); 10 μm (E, F).