Fig. 3.
Coupling ratio and effect of Ca2 + . aleft Subtracted “stimulus” currents are dependent on the Ca2 + concentration as shown for EGTA (green), GTP (blue) and high Ca2 + (red). Right Electrical amplification is exponentially dependent on bathing Ca2 + concentration. Vertical lines represent the expanded standard error. bleft Delta currents are not dependent on the presence of GTP. EGTA (low Ca2 + ) decreased, while high Ca2 + concentration increased electrical stimulation. Vertical lines represent the expanded standard error. Right In contrast, coupling ratios are highest in low Ca2 + (EGTA), while GTP and high Ca2 + are much less efficient. Vertical lines represent the expanded standard error