The broad aim of this series is to work toward "an integrated view of the cell. " It is perhaps fitting that this tenth volume, corresponding to roughly a decade of endeavor in this direction, should cover a wide range of topics from appar ently disparate subject areas and yet reveal a strong underlying unity of approach in each topic. The unifying element is the remarkable extent to which diverse biological processes can now be described (even if not fully explained) in terms of fundamental molecular biology. Chapter 1, by R. Douce, M. A Block, A-J. Dome, and J. Joyard, surveys the great advances that have been made in our understanding of the properties, functions, and biogenesis of plastid envelope membranes. In Chapter 2, G. A Peschek deals in a most comprehensive way with respiratory membranes of cyanobacteria (blue-green algae); his article fills a gap in the literature in a subject that is now attracting increasing attention. R. Sentandreu, E. Herrero, J. P. Martinez-Garcia, and G. Larriba then describe in Chapter 3 the impor tant advances that have been made in our understanding of the structure and biogenesis of the yeast cell wall. B. B. Biswas, B. Ghosh, and A L. Majumder deal in Chapter 4 with a generally neglected area, namely, the role of myo inositol polyphosphates in metabolism. They propose an interesting metabolic cycle involving glucose-6-phosphate and myo-inositol phosphates; this cycle may well be of general importance in many cell types. In Chapter 5, P. S.
1 The Plastid Envelope Membranes: Their Structure, Composition, and Role in Chloroplast Biogenesis.- 1. Introduction.- 2. Structure of the Plastid Envelope.- 3. Relationship between the Plastid and Other Envelope Cell Membranes.- 3.1. Inner Envelope Membrane and Internal Membranes of Plastids.- 3.2. Outer Envelope Membrane and Extrachloroplastal Membranes.- 4. Relationships between the Plastid Envelope and Nucleic Acids.- 4.1. Plastid Envelope and Plastid DNA.- 4.2. Plastid Envelope and Ribosomes.- 5. Isolation of the Chloroplast Envelope.- 6. Chemical Composition of the Plastid Envelope.- 6.1. Chloroplast Envelope Polypeptides.- 6.2 Polar Lipid Composition of Plastid Envelope Membranes.- 6.3. Pigment Composition of Plastid Envelope Membranes.- 6.4. Are Sterols Normal Components of Plastid Envelope Membranes?.- 7. The Plastid Envelope and the Synthesis of Plastid Constituents.- 7.1. Origin of Plastid Polar Lipids.- 7.2. Plastid Envelope and the Synthesis of Isoprenoid Compounds.- 8. Protein Transport through the Plastid Envelope Membranes.- 9. Future Perspectives.- 10. References.- 2 Structure and Function of Respiratory Membranes in Cyanobacteria (Blue-Green Algae).- 1. Introduction.- 2. Membrane Organization in Whole Cells.- 2.1. Outer Membrane and Surface Layers.- 2.2. Cytoplasmic Membrane.- 2.3. Intracytoplasmic Membranes.- 2.4. Morphological Relationships between Cytoplasmic and Intracytoplasmic Membranes.- 3. Isolated Membranes.- 3.1. Comments on the Problem of Separating Cytoplasmic Membranes and Intracytoplasmic Membranes in Cell-Free Extracts of Cyanobacteria.- 3.2. Composition of Isolated Membranes.- 4. Identification of Respiratory Membranes.- 5. Cyanobacterial Respiration.- 5.1. Dehydrogenation of Respiratory Substrates.- 5.2. Respiratory Electron-Transport System.- 6. Oxidative Phosphorylation.- 6.1. Proton Electrochemical Gradients.- 6.2. Phosphorus/Oxygen Ratios in Whole Cells.- 6.3. Oxidative Phosphorylation in Cell-Free Systems.- 6.4. Coupling-Factor Adenosine Triphosphatases.- 7. Respiration and Obligate Photoautotrophy.- 8. Interaction of Respiration and Photosynthesis.- 8.1. Enzyme Regulation.- 8.2. Energy-Charge Regulation (with an Excursion into Substrate-Level Phosphorylation.- 8.3. Common Electron-Transport Sequences.- 9. Summary.- 10. References.- 3 Biogenesis of the Yeast Cell Wall.- 1. Introduction.- 2. Chemistry and Biosynthesis of the Wall Components.- 2.1. Glucan.- 2.2. Chitin.- 2.3. Mannoproteins.- 3. Cell Wall Organization.- 4. Cell Wall Synthesis and Morphogenesis.- 4.1. Origin of the Cell Machinery Involved in Formation of Cell Wall Polymers.- 4.2. Oriented Transport of Synthases and Matrix Materials.- 4.3. Assembly of Cell Wall Components.- 4.4. Metabolic Stability of the Cell Wall and Its Relationship with Biosynthesis.- 5. Concluding Remarks.- 6. References.- 4 myo-Inositol Polyphosphates and Their Role in Cellular Metabolism: A Proposed Cycle Involving Glucose-6- Phosphate and myo-Inositol Phosphates.- 1. Introduction.- 2. Metabolism of myo-Inositol Phosphates.- 2.1. Chemistry and Nomenclature of Inositol Phosphates.- 2.2. Biosynthesis of myo-Inositol Phosphates.- 2.3. Degradation and Utilization of myo-Inositol Phosphates.- 3. Regulatory Aspects of the Metabolism of myo-Inositol Phosphates.- 3.1. Biochemical Regulation of Enzymes of myo-Inositol Phosphate Metabolism.- 3.2. Genetic Studies on the Regulation of myo-Inositol-1-Phosphate Synthase.- 4. Operation of a New Metabolic Cycle Involving Glucose-6-Phosphate and myo-Inositol Phosphates during Formation and Germination of Seeds.- 4.1. Reactions and Enzymes of the Cycle.- 4.2. The Cycle as a Source of Energy and Reducing Power.- 4.3. Interrelationship between This Cycle and the Pentose Phosphate Shunt Pathway in the Early Phase of Germination and Seedling Vigor.- 5. Concluding Remarks.- 6. References.- 5 Nucleocytoplasmic RNA Transport.- 1. Introduction.- 1.1. Aims and Scope of This Review.- 1.2. Terminology.- 1.3. Biological Significan
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