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Figure 5


Fig. 5. Contraction of a dorsal abdominal artery (DAA) ring in response to (A) electrical stimulation (bar, 5 ms pulses, 20 Hz, 5 s duration) and (B,C) continuous superfusion with (B) glutamic acid (GLU; 10 mmol l–1) and (C) proctolin (PR; 1.0 µmol l–1).