Comparison of In Vitro Potencies in Pharmacological and Binding Assays after Inhibition of Peptidases Reveals that Dynorphin ( 1 - 9 ) is a Potent k - Agonist Alexander T McKnight, Alistair D Corbett, Stewart J Paterson, Jacques Magnan and Hans W Kosterlitz, 'Comparison of In Vitro Potencies in Pharmacological and Binding Assays after Inhibition of Peptidases Reveals that Dynorphin ( 1 - 9 ) is a Potent k - Agonist' reprinted from 'Life Sciences', 31 (1982), 1725 - 1728. 1982