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Enzyme assays are among the most frequently performed procedures in biochemistry and are routinely used to estimate the amount of enzyme present in a cell or tissue, to follow the purification of an enzyme, or to determine the kinetic parameters of a system. The range of techniques used tomeasure the rate of an enzyme-catalysed reaction is limited only by the nature of the chemical change and the ingenuity of the investigator. This book describes the design and execution of enzyme assays, covering both general principles and specific chapters.Building upon the highly popular first edition, this book combines revised or rewritten chapters with entirely new contributions. Topics include experi...
First multi-year cumulation covers six years: 1965-70.
During recent years the subject of extreme environments and extremophiles has become a central topic in modern Biology. The capability of some microorganisms to withstand, and often prefer, the harsh conditions found in such environments is helping to define the physicho-chemicallimits of life and in consequence its essential nature. Halophiles are one of the most representative types of extremophiles, requiring high concentrations of inorganic salts, mostly sodium chloride, to grow and survive. They inhabit hypersaline environments, the distribution and abundance of which dur ing geological eras are attested by the vast amounts of evaporite rocks present in the Earth crust and by their role...
Extremophiles is a component of Encyclopedia of Biological, Physiological and Health Sciences in the global Encyclopedia of Life Support Systems (EOLSS), which is an integrated compendium of twenty one Encyclopedias. The extremophiles represent some of the most fascinating organisms on Earth for the simple reason that they inhabit extreme environments characterized by physical and (or) chemical properties which render them totally inhospitable for most of the other organisms. The work has been sub-divided into 6 main topics related to the above mentioned environmental conditions. These topics consist of a general introduction and of several more specialized chapters that have been written by...
In the last 10 years, considerable information has accumulated on the biochemistry of archaea. In this volume, the subject as a whole is treated in a comprehensive manner. The book brings together recent knowledge concerning general metabolism, bioenergetics, molecular biology and genetics, membrane lipid and cell-wall structural chemistry and evolutionary relations, of the three major groups of archaea: the extreme halophiles, the extreme thermophiles, and the methanogens.Subjects included are: the evolutionary relationship of these microorganisms to all other living cells; special metabolic features of archeaea; protein structural chemistry; cell envelopes; molecular biology in archaea including DNA structure and replication, transcription apparatus, translation apparatus, and ribosomal structure; and a final chapter on the molecular genetics of archaea. This comprehensive scope ensures its usefulness to researchers, and stimulates further study in this rapidly developing field.
Advances in Microbial Physiology
Current Topics in Cellular Regulation, Volume 11 focuses on the biochemical mechanisms and key role of the liver in the homeostasis of blood glucose. This book begins with a discussion of glucokinase that is known to play a key role in glucose uptake by liver, followed by a broad overview of the mechanisms that control both glucose uptake by and release from the liver and enzymes involved in glycogen synthesis and breakdown. The classical enzyme models for allosteric regulatory mechanisms known as the biodegradative threonine deaminase are also elaborated. Other topics include the control of blood cholesterol levels, use of cultured mammalian cells, and studies of mutant cell lines. A model for protein turnover is likewise presented, including other mechanisms for the selective degradation of protein, selective uptake by lysosomes, and possible role of stabilizing factors. This publication concludes with an evaluation of complex regulatory mechanisms proposed for the regulation of photosynthetic carbon assimilation. This volume is recommended for biologists and researchers interested in advances in the general area of cellular regulation.
Life has evolved in an extraordinary way to deal with the most extreme physical and chemical conditions. Extremophilic (extreme-loving) organisms have been found in the superheated waters of deep ocean vents or the hypersaline and cold lakes of Antarctica and indeed often require the extreme conditions of their habitat to survive and thrive. The cellular machinery of extremophiles has developed unique adaptation strategies to effectively function in their given environment. Much scientific attention has focussed on the adaptation of proteins as they have both structural and catalytic functions and hence play key roles in all cellular processes. Moreover, their ability to perform in or withst...
The critically acclaimed laboratory standard for more than forty years, Methods in Enzymology is one of the most highly respected publications in the field of biochemistry. Since 1955, each volume has been eagerly awaited, frequently consulted, and praised by researchers and reviewers alike. Now with more than 300 volumes (all of them still in print), the series contains much material still relevant today-truly an essential publication for researchers in all fields of life sciences.This volume and its companions (Volumes 330 and 331) cover all current knowledge concerning hyperthermophilic enzymes. Major topics in this volume include redox and thiol-dependent proteins, nucleic acid modifying enzymes, and protein stability from biochemical and biophysical standpoints.