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Fig. 10. 4-AP depresses the inhibitory actions of ENpa and GSPRFFamide on the
nerve-evoked contraction. (A) Action of 107 mol
l1 ENpa on the contraction in the absence (Ai) or presence
(Aii) of 103 mol l1 4-AP. The contraction
was evoked by the stimulus train (1 ms, 1.6 V, 10 Hz) for 0.4 s. (B)
Inhibitory actions of 107 mol l1 ENpa (Bi,
N=5) and 107 mol l1 GSPRFFamide
(Bii, N=4) in the absence [()4-AP] or the presence [(+)4-AP]
of 103 mol l1 4-AP. Statistical
significance was assessed by Student's t-test.