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Figure 9


Fig. 9. Effects of the cGMP analogue 8BrcGMP (0.3 mmol l–1) on the 5-HT-stimulated light response (A, Ltot; B, RLPmax; C, tip). Responses of specimens injected with both 5-HT and 8BrcGMP had a significantly lower RLPmax compared with the 5-HT control (B, P<0.05). Numbers of replicates: 5-HT, N=10; 5-HT+BrcGMP, N=10; error bars indicate s.e.m.