Figure 2.

Effects of l-dopa and reserpine on average quantal size (A), capacitance step size (B), and vesicular volume (C). Values are expressed as mean ± SEM. The number of quantal events was 141 (from 30 cells) for control, 121 (from 27 cells) for l-dopa, and 93 (from 23 cells) for reserpine. Significantly different from control indicated as ^*p < 0.05 and ^**p < 0.001 (t test). The vesicular catecholamine concentrations (D) are the slopes of the straight lines in Figure 3 A, C,E.