This volume contains the lectures presented at the NATO Advanced Study Institute (ASI) on "Trafficking of Intracellular Membranes: From Molecular Sorting to Membrane Fusion," held in Espinho, Portugal, from June 19 to June 30,1994. The objective of this Institute was to survey recent developments and to discuss future directions in the rapidly advancing field of membrane cell biology, with particular emphasis on the dynamical properties and intracellular flow of membranes. A wide range of interrelated topics around the central theme of intracellular trafficking of membranes was covered,...