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Effects of DrmNPF at 10-5M (horizontal bar) on leucokinin 1 (LK 1)-induced contractions (10-7M) of a single isolated Rhodnius prolixus hindgut. Closed arrows indicate addition of LK 1 at 10-7 M and open arrows indicate washing with physiological saline. Preparations were washed at 5 minute intervals for 20 minutes between additions of peptide solutions. The trace shown here is a representative trace of 3 preparations.
