Result of conference ... held in Verona, Italy on Sept. 21-22, 1995. Includes bibliographical references and index.

Pt. 1. Principles and approaches -- The characterization and classi fication of neurotransmitter receptors -- Protein structures in rece ptor classification -- Transduction is a major factor influencing re ceptor characterization -- To what extent can binding studies allow the quantification of affinity and efficacy? -- Pt. 2. Current issue s and challenges -- Criteria for the classificaiton of hormone recep tors with implications for nomenclature: an impossible task? -- Do r ecombinant receptor assays provide affinity and potency estimates? - - How receptor mutagenesis may confirm or confuse receptor nomenclat ure -- A genome-based receptor nomenclature -- Pt. 3. Influence of r ecent theoretical advances -- Do recent operational studies indicate that a single state model is no longer applicable to G-protein-coup led receptors? -- Agonist efficacy and allosteric models of receptor action -- Protean agonists: keys to receptor-active states? -- Is p romiscuity of G-protein interaction an issue in the classification o f receptors? -- Kinetic modesl of ion channels -- Pt. 4. Oral commun ication -- The classification of bioamine receptors: how helpful are molecular phylogenies? -- Neurokinnin receptors: comparison of data from classical pharmacology, binding, and molecular biology -- The alpha and omega of G-protein-coupled receptors: a novel method for c lassification -- Evoluntionary conservation of the 5-HT2beta recepto rs -- General discussion -- Poster presentations.