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(A) Relaxant effect of NaHS on the rabbit isolated ileum. Results show per cent inhibition of spontaneous contractility and are mean±s.e.mean, n=5. (B) Time-dependent inhibition of the ACh-induced contraction of the guinea-pig isolated ileum to NaHS. ACh (88 nM, EC70 determined in preliminary experiments) was added to the organ bath at timed intervals (5–60 s) after prior application of NaHS (80 μM). Results show per cent reduction in ACh response and are mean±s.e.mean.
