Figure 7.

Effect of SNAP on the light-evoked Ca²⁺ response in cone terminals. A, Light-evoked Ca²⁺ responses in three representative cone terminals (marked by color-coded ROIs) before, during, and after wash-out of SNAP, a NO donor (200 μm, bath application). B, Quantification of the responses of all six cone terminals recorded in the experiment shown in A. C, Summary of the SNAP effect on light-evoked Ca²⁺ responses for n = 19 terminals (from 3 retinas). Wilcoxon signed test for paired samples, **p < 0.01; all others, not significant. See Figure 5 for further experimental details.