Of them, 9 deafness genes expressed more in the apical turn (Pou4f3, Slc17a8, Tmc1, Crym, Otof, Ush1c, Pcdh15, Slc26a5, and Lhfpl5) and six were internal controls (Gapdh, Actb, Rps17, Rpl30, Atp6, and Ipo8). The gene discussed is SLC26A5; the disease is deafness.