Gathering together a number of the best experts in the world, the 27th Jerusalem Symposium was devoted to the theme of the modelling of biomolecular structures and mechanisms. As a result of recent growth in both importance and audience, the papers contained in this volume present a thorough evaluation of the status of the present knowledge in this field. The main topics covered by this year's Symposium include nucleic acids and their interactions, proteins and their interaction, membranes and their interactions, enzymatic processes and the pharmacological and medical aspects of these subjects. Readers will benefit from the interdisciplinary approach which provides an extensive coverage of both theoretical and experimental advances.