Figure 5.

I_Zn–voltage relationship in an ^L247Tα₇ oocyte. Peak currents evoked by Zn²⁺ (10 nM) at various holding potentials. Note the lack of rectification and the null potential at −18 mV. Zn²⁺ was applied at 3-min intervals and holding potential was −50 mV. Curve fitting was as in Fig. 2. (Inset) Sample currents elicited in another oocyte at +45 mV (Upper) and −100 mV (Lower).