Biopolymers, such as proteins and nucleic acids have been subjected to a rational succession of structural studies in which the determination of chemical compositions, link ages, and sequences is followed by investigations of molecu lar architecture and interactions. By the end of the 1960s the covalent structures of glycosaminoglycans and proteo glycans had been defined both within the carbohydrate chains and in respect to their linkages to protein. The scene was therefore set for successful probing of three dimensional shapes and intermolecular associations. For tunately, during the 1970s...

The human brain represents about 2% of the body weight, yet it accounts for approximately 20% of aerobic metabolism. This high dependency on energy-consuming processes is mainly caused by the active transport of ions, which is necessary to compensate for the transmembrane ion currents that are part ofthe complex signaling processes in the brain. Ninety-five percent ofthe brain's ATP is derived from mitochondrial oxidative phosphorylation. Since that organ' s storage capacity for oxygen is minimal, any interruption of oxygen delivery to brain cells willlead to changes in membrane excitability...

F. Macfarlane Burnet I have been an interested onlooker for many years at research on the biology of trace elements, particularly in its bearing on the pas toral and agricultural importance of copper, zinc, cobalt, and mo lybdenum deficiencies in the soil of various parts of Australia. More recently I have developed a rather more specific interest in the role of zinc, particularly in relation to the dominance of zinc metalloenzymes in the processes of DNA replication and repair, and its possible significance for human pathology. One area of special significance is the striking effect of zinc...

Scientific investigations of a descriptive nature involve in- creasingly refined definitions of a problem. An idea is trans- formed after initial experiments into a working hypothesis that has a number of testable consequences. Rarely in the neurosci- ences do such tests completely falsify the hypothesis; more commonly they lead to a modified, more general hypothesis. One could argue that in order to define a scientific problem, one must first understand it. This monograph is an attempt to draw together knowledge and understanding from various disciplines, collected from studies carried out...

F. Macfarlane Burnet I have been an interested onlooker for many years at research on the biology of trace elements, particularly in its bearing on the pas- toral and agricultural importance of copper, zinc, cobalt, and mo- lybdenum deficiencies in the soil of various parts of Australia. More recently I have developed a rather more specific interest in the role of zinc, particularly in relation to the dominance of zinc metalloenzymes in the processes of DNA replication and repair, and its possible significance for human pathology. One area of special significance is the striking effect of...

Denis Noble Nearly a decade after completion of the first draft of the entire Human Genome sequence we are in a better position to assess the nature and the consequences of that heroic achievement, which can be seen as the culmination of the molecular biological revolution of the second half of the twentieth century. The achievement itself was celebrated at the highest levels (President and Prime Minister) on both sides of the Atlantic, and rightly so. DNA sequencing has become sufficiently c- mon now, even to the extent of being used in law courts, that it is easy to forget how technically...

Ischemic brain damage represents a major source of morbidity and mortality in westernized society and poses a significant financial burden on the health care system. To date, few effective therapies have been realized to treat stroke and promising avenues have not proven clinically useful. Recent evidence, however, suggests that channels, pumps, and ionic exchangers are involved in CNS ischemia and ischemic stroke, but the potential contribution of these channels for curing stroke is far less understood than for many other normal and pathological conditions. New Strategies in...

Developing the second edition of Neural Development and Stem Cells was neces- tated by the rapid increase in our knowledge of the development of the nervous system. It has become increasingly clear that stem cells are a heterogeneous population that changes extensively during development. Perhaps the most important advance in our understanding of stem cell behavior has been the realization that regionalization of stem cells occurs early in development and this bias toward differentiation in phe- types of neurons or cells characteristic of a particular part of the brain appears to persist even...

The human brain represents about 2% of the body weight, yet it accounts for approximately 20% of aerobic metabolism. This high dependency on energy-consuming processes is mainly caused by the active transport of ions, which is necessary to compensate for the transmembrane ion currents that are part ofthe complex signaling processes in the brain. Ninety-five percent ofthe brain's ATP is derived from mitochondrial oxidative phosphorylation. Since that organ' s storage capacity for oxygen is minimal, any interruption of oxygen delivery to brain cells willlead to changes in membrane excitability...

Scientific investigations of a descriptive nature involve in- creasingly refined definitions of a problem. An idea is trans- formed after initial experiments into a working hypothesis that has a number of testable consequences. Rarely in the neurosci- ences do such tests completely falsify the hypothesis; more commonly they lead to a modified, more general hypothesis. One could argue that in order to define a scientific problem, one must first understand it. This monograph is an attempt to draw together knowledge and understanding from various disciplines, collected from studies carried out...