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. 2007 Jun 13;27(24):6442–6451. doi: 10.1523/JNEUROSCI.5364-06.2007

Figure 2.

Figure 2.

Ca2+ channel currents carried by Ba2+ (10 mm) in neonatal rat outer and inner hair cells at the age of their respective developmental peaks. A–C, IBa traces and I–V of a rat OHC at P1; C = 7.1 pF, Rleak = 6.1 GΩ, bath solution (B1) included local perfusion with Tris-Cl solution. A, Selected current traces in response to step depolarizations from a holding potential of −68 mV to the potentials indicated for 8 ms. B, Corresponding I–V taken at the last millisecond of the depolarizing pulse in A and fit according to Equation 1 (Vh = −10.4 mV; k = 13.8 mV). C, Selected IBa traces in response to a long inactivation protocol (command voltages are given) show little voltage-dependent inactivation. D–F, IBa of a rat IHC at P9; C = 10.1 pF, Rleak = 2.8 GΩ, bath included Tris-Cl solution. D, Selected current traces in response to short step depolarizations from a holding potential of −70 mV to the potentials indicated. E, Corresponding I–V taken at the last millisecond of the depolarizing pulse and fit (Vh = −19.4 mV, k = 13.6 mV). F, Selected IBa traces in response to a long inactivation protocol (command voltages are given) reveal very little voltage-dependent inactivation.