Contents. List of Contributors. Preface (F.U. Hartl). Targeting Signals for Protein Import into Mitochondria and other Subcellular Organelles (G. von Heijne). Protein Transport into Mitochondria: Cytosolic Factors which operate during and after Translation in Protein Trafficking (L. Estey and M.G. Douglas). Presequence Binding Proteins as Cytosolic Import-Stimulation Factors in Mitochondrial Protein Import (K. Mihara and T. Omura). Molecular Mechanisms of Protein Translocation into and across the Mitochondrial outer Membrane (R. Lill, A. Mayer, H. Steiner, G. Kispal, and W. Neupert). Targeting and Insertion of Proteins into the Mitochondrial outer Membrane (G.C. Shore, H.M. McBride, D.G. Millar, N.A.E. Steenaart, and M. Nguyen). Targeting and Translocation of Preproteins by the TOMs of the Mitochondrial Receptor Complex (P. Keil, A. Hordinger, and N. Planner). Mitochondrial Import of Cytochrome C (M.E. Dumont). Translocation of Preproteins across the Mitochondrial inner Membrane: TIMs and HSP70 (M. Meijer, A. Maarse, M. Kubrich, and N. Planner). Unraveling the Protein Translocation Machinery in the Mitochondrial inner Membrane (N.G. Kronidou and M. Horst). Proteolytic Processing of Mitochondrial Precursor Proteins (W.A. Fenton and F. Kalousek). Sorting of Proteins to the Mitochondrial Intermembrane Space (R.A. Stuart, H. Folsch, A. Gruhler, and W. Neupert). Energetics of Mitochondrial Protein Import and Intramitochondrial Protein Sorting (S. Rospert). Export of Proteins from Mitochondria (R.O. Poyton, K.A. Sevarino, E.E. McKee, D.J.M. Duhl, V. Cameron, and B. Goehring). Protein Folding in Mitochondria (J. Hohfeld). Assembly of Multisubunit Complexes in Mitochondria (M. Prescott, R.J. Devenish, and P. Nagley). The Division and Inheritance of Mitochondria (M.P. Yaffe). Index.