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Figure 1


Fig. 1. Effects of proctolin and octopamine on the cAMP concentration in Idotea muscle fibres. (A) Without preequilibration in ASW, the cAMP concentration does not change significantly after 15 min of exposure to 1 µmol l-1 proctolin (N=8), whereas 15 min of exposure to 10 µmol l-1 octopamine increases the cAMP concentration significantly (N=5). (B) In fibres equilibrated for 10 min in ASW after dissection, 3 min of simultaneous exposure to 1 µmol l-1 proctolin and the phosphodiesterase inhibitor 0.5 mmol l-1 IBMX (N=8) does not change the cAMP concentration compared to controls with IBMX alone (N=8). *P<0.05.





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