The Interaction of [Met"5"] Enkephalin and [Leu"5"] Enkephalin Sequences, Extended at the C - Terminus, with the µ - , "d" - and k - Binding Sites in the Guinea - Pig Brain Jacques Magnan, Stewart J Paterson and Hans W Kosterlitz, 'The Interaction of [Met"5"] Enkephalin and [Leu"5"] Enkephalin Sequences, Extended at the C - Terminus, with the µ - , "d" - and k - Binding Sites in the Guinea - Pig Brain' reprinted from 'Life Sciences', 31 (1982), 1359 - 1361. 1982