TRPM5 expression in mouse main olfactory epithelium and the vomeronasal organ. Confocal images of TRPM5-specific signals (left panels) and overlay with corresponding DIC images (right panel) are depicted. (A-D) Immunolocalization of TRPM5 in solitary cells of the main olfactory epithelium is shown at lower (indicated by the arrows in (A, B)) and higher magnifications (C, D). (E-H) Immunohistochemistry of TRPM5 in the VNO. (E, F) Localization of TRPM5 on the apical surface of sensory epithelia (indicated by the arrow). (G, H) Detection of TRPM5-enriched solitary cells in the non-sensory part of the VNO. Scale bars are 20 μm.