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Much of the information currently available on the transport systems of bacterial and animal cell membranes and their mode of coupling to metabolic supply of energy can be found in this volume. Consideration of the participating enzymes dictated the choice of topics: Several transport systems where little information is available on the enzymology of the process are not included, while separate chapters deal with y-glutamyl transpeptidase and intestinal disaccharidases which meet many of the requirements of transport enzymes. The volume also includes two chapters on photosynthetic membranes as a general introduction to the topic. Other aspects of biological transport and photosynthesis will be developed in detail in a forthcoming volume now in preparation. These chapters reveal the excitement and rapid advance of the field, the daily reports of new concepts, new techniques, and new experimental findings which instantly interact to generate further progress. Our aim was to provide a starting point for those who are just beginning, and an opportunity for others to stop, take stock, and start in a new direction. My warmest thanks to all who contributed to this volume.
"After being frequently urged to write upon this subject, and as often declining to do it, from apprehension of my own inability, I am at length compelled to take up the pen, however unqualified I may still feel myself for the task. " William Withering, M. D. ' I have yet to find a description or a quote that better summanzes my initial ambivalence towards embarking on such an endeavor as partici pating in putting together this monograph. The impetus for The Red-Cell has been a simple, genuine Membrane: A Model for Solute Transport desire to bring together an authoritative account of the' 'state of the art and knowledge" in the red-ceIl-membrane transport field. In particular, it seems impor...
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The crucial role played by calcium as a cellular messenger has become increasingly evident, as has the recognition that cells spend much energy in maintaining the cytosolic concentration of this cation both constant and low. It is thought they do this to avoid precipitating phosphate, needed as a source of bond energy and to modulate protein structure. Moreover, since calcium that does enter the cell must be disposed with, processes that utilize calcium have evolved, e.g. secretion, contraction, signaling, to name just some. New knowledge concerning the processes of cellular calcium entry, extrusion and the fate of intracellular calcium has accumulated in recent years. Much has also been learned about calcium transport by and across epithelial cells. It seems logical to think that the processes of calcium entry, extrusion and intracellular handling are similar in all cells. We have therefore assembled in one volume overviews and research reports of transport and cellular calcium regulation so as to explore similarities and differences between cells that utilize calcium for metabolic purposes and those whose primary function is transport.
List of members in each volume.
In the last decade there have been rapid developments in the field of computer-based learning environments. A whole new generation of computer-based learning environments has appeared, requiring new approaches to design and development. One main feature of current systems is that they distinguish different knowledge bases that are assumed to be necessary to support learning processes. Current computer-based learning environments often require explicit representations of large bodies of knowledge, including knowledge of instruction. This book focuses on instructional models as explicit, potentially implementable representations of knowledge concerning one or more aspects of instruction. The book has three parts, relating to different aspects of the knowledge that should be made explicit in instructional models: knowledge of instructional planning, knowledge of instructional strategies, and knowledge of instructional control. The book is based on a NATO Advanced Research Workshop held at the University of Twente, The Netherlands in July 1991.
Calcium and Cell Function, Volume I: Calmodulin covers calmodulin-regulated functions. The book discusses the preparation, properties, structure, function, evolution, and structure-function relationships of calmodulin; and calmodulin-dependent adenylate cyclase. The text also describes the transport of calmodulin and plasma membrane calcium; the role of calmodulin and troponin in the regulation of phosphorylase kinase from mammalian skeletal muscle; and calcium-dependent protein phosphorylation in mammalian brain and other tissues. The role of calmodulin in dopaminergic transmission; the immunocytochemical localization of calmodulin in rat tissues; and the immunocytochemical studies of the localization of calmodulin and caM-BP80 in the brain are also considered. The book further tackles the mechanisms and pharmacological implications of altering calmodulin activity. Molecular cardiologists, biochemists, and pharmacologists will find the book invaluable.
First multi-year cumulation covers six years: 1965-70.