Cardiac arrest after injection of different concentrations of dromyosuppressin (DMS) in the blowfly. Percentage of flies with arrest (A) and mean value ± SE of duration of cardiac arrest (B). Each DMS concentration was tested in 10 flies. Saline was applied as a control (C) in 10 flies. The values were: 2.10 ± 0.43 minutes, 1.50 ± 0.24 minutes, 1.31 ± 0.29 minutes, 0.99 ± 0.47 minutes, 0.40 ± 0.15 minutes and 0.15 ± 0.07 minutes for the 10 μM, 1 μM, 0.1 ηM, 1 ρM, 5 fM and 0.5 fM solutions, respectively.