(A–I) Cochlear whole mounts of tamoxifen-treated Atoh1-CreER™Pjvkfl/+, Atoh1-CreER™Pjvkfl/fl and Prestin-CreERT2
Pjvkfl/fl mice at P60 were stained with phalloidin (F-actin, green), DAPI (nuclei, blue) and an antibody against myosin VIIa (red) to visualize hair cells. Apical, middle and basal cochlear turns for each genotype are shown. (J, K) Quantification of hair cell density in four different regions (apex, apex-mid, mid-base and base) along the cochlear sensory epithelium of tamoxifen-treated Atoh1-CreER™; PjvkCKO (J) and Prestin-CreERT2; PjvkCKO (K) mice at P60. Data are presented as mean ± SEM. *p < 0.05, *p < 0.01, ***p < 0.001 (Student’s t-test, n = 3 mice per group). Scale bars: (in I) A–I, 10 μm.