These analyses offer some hints about chromatin organization of the Ush1g-Otop2 locus in mouse and human, and are a resource for further investigating the role of mammalian insulator CTCF in orchestrating gene expression at this locus.ResultsComparative sequence data setsWe sought to characterize the genomic regions encompassing Otop1 and the Ush1g-Otop2-Otop3 cluster in a diverse set of vertebrat