Has a biophysical approach helped to understand lipids and membrane structure? A personal perspective, D. Chapman; cholesterol absorption by small intestine brush border membrane is protein-mediated, H. Hauser; role of saturated bonds in lipid phase behaviour, K.M.W. Keogh; modulation of membrane lipid phase behaviour by chemical modification in situ, P.J. Quinn; non bilayer lipid phases, G. Lindblom; phase behaviour of mixed lipid systems, J.C. Gomez-Fernandez; interfacial conformation and transbilayer movement of diacylglycerols in phospholipid bilayers, D.M. Small; membrane lipid matrices and receptor-ligand interactions, G.G. Shipley; cholesterol-phospholipid interactions and the exchangeability of cholesterol between membranes, M.C. Philips; developments in the NMR spectroscopy of lipids and membranes: the first quarter century, E.Oldfield; rotational motion of membrane proteins, studies of band 3 in the human erythrocyte membrane using triplet probes, R.J. Cherry; modulation of protein structure by the lipid environment, H.H. Mantsch; infrared studies of membrane proteins, D. Lee; biomembrane technologies, J. Hayward.