Fig. 7. The effects of CabTRP Ia on nerve-evoked excitatory junction potentials (EJPs) in six stomatogastric muscles. (A) Nerve-evoked EJP in a gastric mill 8a (gm8a) muscle fiber in control saline (black), after 10 min in 10^–7 mol l^–1 CabTRP Ia (red), and after rinsing the peptide (green). The membrane potential was –77 mV for all three conditions. Each trace in this panel is the average of four EJPs elicited at 20 s intervals. (B) A bar graph plot of average gm8a EJP amplitude in control saline and after 10 min in 10^–7 mol l^–1 CabTRP Ia. The increase in amplitude in CabTRP Ia was significant (N=6; paired t-test, **P<0.01). (C) A bar graph showing the average increase in EJP amplitude in 10^–7 mol l^–1 CabTRP Ia for six stomatogastric muscles: gastric mill 4 (gm4; N=5), gastric mill 5a (gm5a; N=6), gastric mill 6a (gm6a; N=8), gm8a (N=6), pyloric 1 (p1; N=8) and pyloric 2 (p2; N=6). For each individual experiment used to construct this panel, the EJP amplitude was determined by averaging four EJPs, as in A. For each muscle, significance was computed using paired t-tests on the EJP amplitudes (*P<0.05, **P<0.01, ***P<0.001).