The Interaction of Opioid Peptides and Alkaloid Opiates with µ - "d" - and k - Binding Sites Two different copies of Stewart J Paterson, Jacques Magnan, Alessandra Tavani and Hans W Kosterlitz, 'The Interaction of Opioid Peptides and Alkaloid Opiates with µ - "d" - and k - Binding Sites' reprinted from H Takagi and E J Simon, eds., 'Advances in Endogenous and Exogenous Opioids Proceedings of the International Narcotic Research Conference' (Tokyo, 1981), 2 - 4. 26 - 30 July 1981