Fig. 4.
Endolymphatic duct and sac of Atp6v0a4 mutants is abnormally expanded. (A-F) H&E staining of sections at E16.5 (A,B) and P0 (C-F). Mutant mice show a clear expansion of the endolymphatic duct and sac at E16.5 (A,B) and in newborn mice (C-F). Higher magnification at P0 (E,F) shows an abnormal enlargement of the endolymphatic duct and sac in mutants (F) without the typical infolded epithelium seen in the wild types (E). ED, endolymphatic duct; CO, cochlea. Scale bars: (A-D) 300 μm; (E,F) 200 μm.