I: The Nature of Biological Membranes.- 1: The Anatomy of Biological Interfaces.- 1. Introduction.- 2. Models of Membrane Structure.- 3. Membrane Junctions.- 4. Certain Specialized Membranes.- 5. Artificial Membrane-Protein Interactions.- 6. Membrane Fluidity.- 7. Mechanisms of Protein-Lipid Interaction.- 8. Mueller-Rudin Bilayer Membranes.- 9. Freeze-Fracture-Etch Studies of Membranes.- 10. Summary.- References.- 2: Dynamics of Lipids in Biomembranes.- 1. The Molecular Organization of Lipids in Biomembranes.- 2. Molecular Structure of Membrane Lipids.- 3. Molecular Motions in Bilayers.- 4. Interactions between Lipids in Bilayers.- 5. Summary.- References.- 3: Membrane Proteins: Structure and Arrangement in the Membrane.- 1. Introduction.- 2. Protein Composition of Membranes.- 3. Types of Membrane Proteins.- 4. Extrinsic Proteins.- 5. Intrinsic Proteins.- 6. Types of Intrinsic Membrane Proteins.- 7. The Structure of the Intramembrane Portion.- 8. The Quaternary Structure of Intrinsic Proteins.- 9. Summary.- References.- II: Methods for Studying Membranes.- 4: The Nature and Limitations of Electron Microscopic Methods in Biology.- 1. Introduction.- 2. The Conventional Transmission Electron Microscope.- 3. Specimen Preparation.- 4. Embedding.- 5. Sectioning.- 6. Positive Staining.- 7. Negative Staining.- 8. Low Dose Electron Microscopy.- 9. The Freeze-Fracture-Etch Technique.- 10. Summary.- References.- 5: Isolation and Characterization of Biological Membranes.- 1. Introduction.- 2. Methods for Dissociating and Separating Cells.- 3. Isolation of Plasma Membranes.- 4. Assessment of Purification.- 5. Expression of Data.- 6. Functional Properties of Plasma Membranes.- 7. Pathological Considerations.- 8. Summary.- References.- 6: Ultraviolet Absorption, Circular Dichroism, and Optical Rotatory Dispersion in Biomembrane Studies.- 1. General Considerations.- 2. Distortions and Corrections for Suspensions.- 3. Purple Membrane as a Sample Calculation.- 4. Summary.- Referencesl“.