Fig. 2. A representative example of perforated whole-cell current of a frog parathyroid cell in normal saline solution. (A) Transient inward currents were elicited in response to 15 ms voltage steps between –74 to +56 mV in 10 mV increments from a holding potential of –84 mV. The leak currents were not subtracted from the current traces. (B) Pooled current–voltage (I–V) relationships for the inward currents (N=17) elicited by the voltage steps. Values are means ± S.E.M.