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Fig. 12. Actions of the peptides on the vasoconstriction of the abdominal aorta. The
vasoconstricion was monitored by an internal pressure change of the perfusion
line as described in Materials and methods. Typical examples of the peptide
actions (i) and the concentrationresponse relationships (ii) are shown.
(A) Action of ENpa (N=4). (B) Action of GSPRFFamide (N=3).
(C) Action of NdWFamide (N=3). The pressure change was evoked by
stimulation of the pericardial nerve using the stimulus train (1 ms, 1.6 V, 10
Hz) for 0.9 s (A,B) or 0.5 s (C).