Fig 3. ZnCl₂ blocks membrane current in Bge cells.

A. Control response to a voltage step (from -50 mV to 20 mV indicated below) (top). One mM ZnCl₂ was pressure applied onto Bge cells (middle). Wash response was measured10 min after post-ZnCl₂ removal (lower). B. Time course plot is presented for perfusion of 1 mM ZnCl₂. The bar labeled 1 mM ZnCl₂ above represents the time of ZnCl₂ application. C. Bar graphs show the mean current amplitude for control and in the presence of 1 mM ZnCl₂ after full effect was reached (mean ± SEM; N = 4; *p < 0.05).