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Author: Alecsandru Ioan Baba
Publisher:
ISBN: 9789732714577
Category : Electronic books
Languages : en
Pages : 787
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Book Description
Author: Alecsandru Ioan Baba
Publisher:
ISBN: 9789732714577
Category : Electronic books
Languages : en
Pages : 787
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Book Description
Author: Felix Bronner
Publisher: Elsevier
ISBN: 0323149995
Category : Science
Languages : en
Pages : 448
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Book Description
Cell Shape: Determinants, Regulation, and Regulatory Role is written to help readers understand cell shape and its regulation. It provides insight into how the shape of a cell is determined at a molecular level. It also discusses how the shape of the cell, as a signal, controls gene expression and modulates intercellular interaction. Divided into four parts encompassing 13 chapters, this volume begins with an overview of the mechanism of shape determination. It then explores how the cytoskeleton, the extracellular matrix, and biochemical force transduction may affect or respond to cell shape control. Other chapters focus on the mechanical modeling of cell shape and the biochemical reactions underlying cell motility. The text also describes the results of the molecular studies that have provided important information on the composition of the cytoskeleton. The final chapter reviews the shape changes that happen during embryogenesis. It also considers how the polarity of the embryo is determined. This book is a valuable resource for biologists, embryologists, and cell biologists.
Author: Bruce Alberts
Publisher:
ISBN: 9780815332183
Category : Cytology
Languages : en
Pages : 0
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Book Description
Author: M. Bessis
Publisher: Springer Science & Business Media
ISBN: 3642880622
Category : Medical
Languages : en
Pages : 182
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Book Description
This monograph is a collection of invited contributions from a group of investiga tors who share a common interest in the interrelationships between the shape, struc ture, and functional characteristics of normal and pathologic erythrocytes. Most of the authors participated in a workshop on red cell shape held in June, 1972 at the Institute of Cell Pathology, Hopital de Bicetre, Paris. We hope that these various contributions on the physiology, pathology, and ultrastructure of red cell shape will be useful and stimulating for other investigators interested in the correlation of shape and structure with the biochemistry and biophysics of the red cell. The text is divided into four sections. Section I deals with red cell shape, including the presentation of a rational descriptive nomenclature and a discussion of post splenectomy changes. Section II deals with biochemical factors that underlie the disco cyte-echinocyte (crenated) and discocyte-stomatocyte (cup-shaped) transformation. This section includes discussions of plasma factors, and of the biochemical dynamics of erythrocyte lipids and consideration of the effects of such factors as cellular ATP, calcium, aging, and various chemical agents as determinants of shape. Section III, which deals with biophysical measurements, includes studies of the deformability of cells of different shapes, descriptions of ways to define precisely the geometric dimensions of the red cell under various circumstances, and a model of membrane structure, which is proposed to account for the dimensions of red cells that undergo shape change.
Author: Jennifer Stearns
Publisher: John Wiley & Sons
ISBN: 1119544416
Category : Science
Languages : en
Pages : 384
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Book Description
Microbiology For Dummies (9781119544425) was previously published as Microbiology For Dummies (9781118871188). While this version features a new Dummies cover and design, the content is the same as the prior release and should not be considered a new or updated product. Microbiology is the study of life itself, down to the smallest particle Microbiology is a fascinating field that explores life down to the tiniest level. Did you know that your body contains more bacteria cells than human cells? It's true. Microbes are essential to our everyday lives, from the food we eat to the very internal systems that keep us alive. These microbes include bacteria, algae, fungi, viruses, and nematodes. Without microbes, life on Earth would not survive. It's amazing to think that all life is so dependent on these microscopic creatures, but their impact on our future is even more astonishing. Microbes are the tools that allow us to engineer hardier crops, create better medicines, and fuel our technology in sustainable ways. Microbes may just help us save the world. Microbiology For Dummies is your guide to understanding the fundamentals of this enormously-encompassing field. Whether your career plans include microbiology or another science or health specialty, you need to understand life at the cellular level before you can understand anything on the macro scale. Explore the difference between prokaryotic and eukaryotic cells Understand the basics of cell function and metabolism Discover the differences between pathogenic and symbiotic relationships Study the mechanisms that keep different organisms active and alive You need to know how cells work, how they get nutrients, and how they die. You need to know the effects different microbes have on different systems, and how certain microbes are integral to ecosystem health. Microbes are literally the foundation of all life, and they are everywhere. Microbiology For Dummies will help you understand them, appreciate them, and use them.
Author: Robert Hooke
Publisher:
ISBN:
Category : Hair
Languages : en
Pages : 394
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Book Description
Author: Hiroo Fukuda
Publisher: John Wiley & Sons
ISBN: 1118647378
Category : Science
Languages : en
Pages : 448
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Book Description
Cell walls are defining feature of plant life. The unique and multi-faceted role they play in plant growth and development has long been of interest to students and researchers. Plant Cell Wall Patterning and Cell Shape looks at the diverse function of cell walls in plant development, intercellular communication, and defining cell shape. Plant Cell Wall Patterning and Cell Shape is divided into three sections. The first section looks at role cell walls play in defining cell shape. The second section looks more broadly at plant development. While the third and final section looks at new insights into cell wall patterning.
Author: Samantha Fowler
Publisher:
ISBN: 9789888407453
Category : Science
Languages : en
Pages : 618
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Book Description
Concepts of Biology is designed for the single-semester introduction to biology course for non-science majors, which for many students is their only college-level science course. As such, this course represents an important opportunity for students to develop the necessary knowledge, tools, and skills to make informed decisions as they continue with their lives. Rather than being mired down with facts and vocabulary, the typical non-science major student needs information presented in a way that is easy to read and understand. Even more importantly, the content should be meaningful. Students do much better when they understand why biology is relevant to their everyday lives. For these reasons, Concepts of Biology is grounded on an evolutionary basis and includes exciting features that highlight careers in the biological sciences and everyday applications of the concepts at hand.We also strive to show the interconnectedness of topics within this extremely broad discipline. In order to meet the needs of today's instructors and students, we maintain the overall organization and coverage found in most syllabi for this course. A strength of Concepts of Biology is that instructors can customize the book, adapting it to the approach that works best in their classroom. Concepts of Biology also includes an innovative art program that incorporates critical thinking and clicker questions to help students understand--and apply--key concepts.
Author: Natalie Anne Dye
Publisher: Stanford University
ISBN:
Category :
Languages : en
Pages : 286
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Book Description
This work focuses on the mechanism by which MreB contributes to the maintenance of cell shape in the gram-negative alpha-proteobacterium Caulobacter crescentus. The gene mreB encodes a protein that resembles actin, a eukaryotic cytoskeletal protein. Previously, it was shown that mreB is required to maintain a rod-like shape and localizes to a helical pattern near the cytoplasmic membrane. Here, we show that MreB is associated with regions of active growth in Caulobacter, as mutant strains that mislocalize MreB to the cell poles direct new growth at or near the poles. We present evidence to suggest that MreB contributes to the determination of proper length, width, and curvature through partially distinct mechanisms. The determination of proper width involves the essential proteins MreC and Pbp2, which are encoded in the mreB operon. While MreB and MreC are both required to position the cell wall transpeptidase Pbp2 along the lateral sidewalls and away from midcell, the two do not colocalize and each can maintain its localization in the absence of the other. When MreB is mislocalized to the poles, MreC and Pbp2 do not follow. These data argue against the idea that MreB provides a scaffold-like structure to localize enzymes that directly modify the cell wall. The determination of proper curvature, involves the intermediate filament-like protein, Crescentin. We identify a putative binding site on MreB for Crescentin or other curvature-mediating factors. We also show that the extent to which the subcellular localization of MreB changes over the cell cycle is correlated with cell size, indicating that MreB is involved in the coordination between elongation and division. In addition, we show that in vitro purified MreB spontaneously forms very stable polymers in the presence or absence of nucleotide. These polymers are globular or amorphous and only filamentous when placed on a highly positively charged surface of Poly-L-lysine. These in vitro data suggest that MreB is likely to be regulated at the disassembly step in the cell and that the cellular environment may influence the structure of MreB polymers. Lastly, we present biochemical evidence to support the existence of a disassembly factor in cytoplasmic Caulobacter extract. Together our data suggest that the maintenance of the crescent-rod cell shape in Caulobacter is the result of a complicated balance between MreB's dynamic subcellular localization, polymeric structure, and communication with cellular components.
Author: Gregory R. Bock
Publisher: John Wiley & Sons
ISBN: 0470017651
Category : Science
Languages : en
Pages : 251
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Book Description
This book features contributions from experts in cell biology, genetics, neurobiology, immunology and structural biology. The unifying element is that they all study processes of cell shape change and motility. Several key questions in this field of research are discussed: What are the organising principles behind cell shape change? Are there ‘master switches’ present in every cell type? How are extracellular signals interpreted by the cell in order to activate intracellular mechanisms? What is the influence of the extracellular matrix on cell movement and internal signalling pathways? How do pathogens subvert cellular systems in order to stimulate or block their uptake? The book addresses all of these important questions. Data are presented on the key proteins that regulate cell shape: the GTP binding proteins of the Rho family. There are also extensive discussions of the potential applications of the data to clinical problems, particularly that of cell motility in cancer.
