Bar indicates 100 ??m in all except in A???, B???, M, N where it indicates 10 ??m.Conditional deletion of Atoh1 using Pax2-Cre results in viable mice without differentiated cochlear hair cells that have lost most of the organ of CortiHear Res. ;275(1-2):66-80.Figure 9Flanking markers define the cellular loss of the organ of Corti in the Atoh1 CKO mutant(A???B???) Fgf10 and Bmp4 expression shown by