Cover: In situ hybridization for Eya4 mRNA in the developing rat cochlea peaks at embryonic day 18.5 and is found preferentially in the greater and lesser epithelial ridges in the lower half of the duct epithelium, most clearly seen in the bottom right. At older ages, expression becomes restricted to cells derived from the spiral limbus, organ of Corti and spiral prominence. See Report by Wayne et al. in this issue, pp. 195-200.
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