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. 2009 Feb 23;587(Pt 8):1715–1726. doi: 10.1113/jphysiol.2009.168542

Figure 5. Coupling between Ca2+ channels and the RRP in immature gerbil IHCs.

Figure 5

A and B, ΔCm recordings from apical (A) and basal (B) immature IHCs in response to a 100 ms voltage step (from −81 mV to around −11 mV) using 0.1 mm, 0.6 mm and 1 mm intracellular BAPTA. C and D, average ΔCm from apical and basal IHCs, respectively, in response to voltage steps between 5 ms and 100 ms using the above BAPTA concentrations. E, average ΔCm (top panel) and peak ICa (bottom panel) at 50 ms, in order to measure the isolated RRP, from data shown in C and D. ΔCm values obtained in EGTA from Fig. 1C were also included. Number of cells in EGTA (1 mm) and BAPTA (0.1, 0.6, 1 mm) are: apical: 6, 3, 3, 3 (P5–P8); basal: 10, 1, 4, 4 (P6–P8).