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Schild analysis of peptide 5 as an antagonist of Dyn A-(1-13)NH2 at κ opioid receptors in the adenylyl cyclase assay. DR = dose ratio (EC50 of Dyn A-(1-13)NH2 in the presence of the indicated concentration of 5 divided by the EC50 of Dyn A-(1-13)NH2 in the absence of 5). Data shown are pooled data from three separate experiments.
