The meeting on "Dynamics of Membrane Assembly.", sponsored by NATO Scientific Affairs Division as an Advanced Study Institute and by FEBS as a Lecture Course was held in Cargese, France, in June 1991. The program included introductory lectures, specialized up-to-date contributions and poster sessions. Emphasis was laid on the new developments in the field of membrane biogenesis, in particular on the biosynthesis of phospholipids and the application of modern genetic techniques in these studies; on the membrane insertion and translocation of proteins; on intracellular protein and membrane traffic; and on the mutual interactions between the various events occurring during membrane biogenesis. Much progress in these research areas has been made in recent years and the ASI provided an excellent opportunity to illustrate this progress in comparison with previous meetings on a similar topic. Not only graduate students and postdocs took advantage from this program but also experienced scientists were given the opportunity to obtain a complete overview of recent progress and the remodelling of ideas and concepts.