Figure 9.

Divalent cations decrease g_j of Cx36 GJs. A, Dynamics of g_j (normalized to initial g_j value) changes for different divalent cations. B, Average g_j (normalized to initial g_j values) from experiments using pipette solution containing the following: nominally zero divalents (n = 5); 2 mm free Mg²⁺ (n = 3), Ca²⁺ (n = 5), Ba²⁺ (n = 5), Mn²⁺ (n = 6), Cd²⁺ (n = 4), Zn²⁺ (n = 3); 0.2 mm free Zn²⁺ (n = 4). C, Average time for g_j to undergo 95% of the change from initial to virtual steady-state conductance after beginning dual whole-cell voltage clamp.