Criteria for inclusion and other relevant information for genes included in this study, and references.

In the “Criteria for inclusion column,” letter codes mean the following: A, upregulated in an echolocating bat vs. a non-echolocating bat; B, upregulated in an adult mouse relative to juvenile mouse; C, expressed in mid- to late- development; D, exhibits signs of parallel or convergent evolution between echolocating bats and whales; E, exhibits signs of parallel or convergent evolution between distantly related echolocating bats; F, participates in forming essential cochlear structures. aMutations in Gjb6 may cause hearing loss by inducing a downregulation of Gjb2. Gjb6 appears not be critical for hearing, unlike Gjb2 (see [64]).