Figure 3.

Quantification of KCNJ10 and KCNQ1 mRNA expression in stria vascularis and spiral ganglia of Slc26a4^+/+ and Slc26a4^-/- mice. a: Electropherogram of total RNA isolated from stria vascularis microdissected from one mouse. The amount of total RNA was obtained from the total integral (shaded) and the amount of 18S rRNA was obtained from the integral of the 18S peak. Sharp peaks representing 18S and 28S rRNA demonstrate the high quality of RNA. Insert: Genotype of Slc26a4^-/- mice was verified by the observation of one or few very large rhomboedric otoconia in the utricular macula (arrow). A, crista ampullaris; U, utricular macula. Scale bar: 100 μm. b: Example of real-time RT-PCR data used for quantification of 18S, KCNJ10, KCNQ1 and KCNQ4. Known quantities of 18S rRNA were used to calibrate the threshold. SV, stria vascularis; SG, spiral ganglia. c: Quantification of KCNJ10 and KCNQ1 mRNA in young Slc26a4^+/+ and young and old Slc26a4^-/- mice.