Contents. List of Contributors. Acknowledgements (M.G. Ord and L.A. Stocken). Introduction. Bioenergetics after 1960: From the Chemiosmotic Hypothesis to Structure-Based Molecular Mechanisms (S.J. Ferguson). Changing Views of Photosynthesis (F.R. Whatley). Muscle Contraction and Relaxation (S.V. Perry). Three Hundred Years of Bacterial Motility (J.P. Armitage). Talking to Cells-Cell Membrane Receptors and their Modes of Action (R.F. Irvine). Mechanisms in Regulation: Protein Phosphorylation (P.J. Randle). Regulation of Expression of Microbial Genes (P.H. Clarke). Antibody Specificity and Diversity: The Proteins (Part I) L.A. Steiner). Author Index. Subject Index.