Immunoreactivity for EP2 in the cochlea. EP2 expression (red) was detected n the cochlear sensory epithelium (A; I, inner hair cell; O, outer hair cell; D, Deiter's cell; C, Claudius' cell), spiral ganglion neurons (B; SG), spiral ligament (C; ligament) and stria vascularis (C; SV). Nuclei were labeled with DAPI. The specimens were viewed with 63× oil objective. Scale bar = 200 μm.