Titlebook: Neuroreceptors and Signal Transduction; Shozo Kito,Tomio Segawa,Richard W. Olsen Book 1988 The Editor(s) (if applicable) and The Author(s)

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Studies of Multiple Morphine and Enkephalin Receptors: Evidence for Mu1 Receptors,ged, unlike enzymes which modify subtrates. The realization that subtypes of receptors for a ligand may exist has opened a number of possibilities in drug development and remains important. In the past, the classification of receptor subtypes rested heavily upon either classical bioassays or in vivo