Figure 9From: Once upon a time the cell membranes: 175 years of cell boundary researchPossible molecular arrangements of biological membranes redrawn from Danielli in 1936 [ [101]] . A-E. Cross-section of hypothetical membranes with internal lipids and coating proteins. F. Cross-section of an hypothetical membrane made up of lipoprotein subunits. G-I. Surface of mosaic membranes.Back to article page