Fig. 2. TMRD and peripherin labeling in the E18 mouse cochlea. (A) An overview of TMRD (red) and peripherin (green) labeling in the cochlea shows that the TMRD-labeled type I neurons were found in both the apical and the mid-turn regions, while peripherin expression in the type II neurons was higher in the mid turn. In this example, peripherin was strongly expressed in a single neuron located close to the modiolus in the apical turn (arrow). (B) TMRD and peripherin labeling was independent in the SGN. The peripherin-expressing neurons were scattered throughout the ganglion. Scale bars: 50 µm in A; 10 µm in B. igsb, intraganglionic spiral bundle; isp, inner spiral plexus; osb, outer spiral bundles.