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Bcateriology: an overview; Bacterial structure; Bacterial nutrition and metabolism; Growth of bacterial cultures; Gene expression and regulatory mechanisms; DNA replication and mutation bacteria; Genetic exchange between bacteria; Plasmids; General properties of bacterial viruses; Lytic development of phages; Lysogeny in temperature phages; DNA restriction and gene cloning; Chemotherrapy and antibiotics.
This text describes the structure, functions, transmission and applications of bacterial plasmids. The rate of research and accumulating knowledge on bacterial plasmids since the first edition, has established a need for a thorough revision and update. Each chapter has been brought up-to-date, and current developments in the understanding of plasmid replication and transposable elements have received special attention.
A comprehensive introduction to this rapidly advancing subject. This fourth edition has been extensively revised and reorganized to reflect advances in the field. All of the major topics in modern bacterial and bacteriophage genetics are presented, including mutations and mutagenesis; genetics of lytic and temperate bacterial viruses; transduction; genetic transformation; conjugation and plasmids; regulatory systems; recombination and repair; probability analysis in bacterial genetic experiments; applied basic genetics; evolutionary genetics. This new edition includes a greater discussion of evolutionary issues and contains problem sets at the ends of each chapter to test students'understanding.
Bacterial genetics has become one of the cornerstones of basic and applied microbiology and has contributed key knowledge for many of the fundamental advances of modern biology. The second edition of this comprehensive yet concise text, first published in 1981, has been thoroughly updated and redesigned to account for new developments in this rapidly expanding field. All of the major topics in modern bacterial and bacteriophage genetics are presented, among them mutations and mutagenesis, genetics of T4 bacteriophage and other intemperate and temperate phages, transduction, transformation, conjugation and plasmids, recombination and repair, probability laws for prokaryote cultures, as well as applied bacterial genetics.
Bacteriophages are viruses that utilise bacterial cells as factories for their own propagation and as safe havens for their genomic material. They are capable of equipping bacteria with properties that bestow environmental advantages. They are also capable of specifically and efficiently killing bacteria.Bacteriophages are resilient in a wide diversity of environments, presumed to be as ancient as life itself, and are estimated to be the most numerous biological entities on the planet. Their overarching capacity to survive via molecular adaptation is supported by an arsenal of encoded enzymatic tools, which also enabled biotechnology. This volume includes contributions that describe bacteriophages as nanomachines, genetic engineers, and also as medicines and technologies of the future, including relevant production and process issues.
Bacterial plasmids originating in a wide range of genera are being studied from a variety of perspectives in hundreds of laboratories around the globe. These elements are well known for carrying "special" genes that confer important survival properties, frequently neces sary under atypical conditions. Classic examples of plasmid-borne genes are those provid ing bacterial resistance to toxic substances such as antibiotics, metal ions, and bacte riophage. Often included are those determining bacteriocins, which may give the bacterium an advantage in a highly competitive environment. Genes offering metabolic alternatives to the cell under nutritionally stressed conditions are also commonly found on plasmids, as are determinants important to colonization and pathogenesis. It is likely that in many, if not most, cases plasmids and their passenger determinants represent DNA acquired recently by their bacterial hosts, and it is the characteristic mobility of these elements that enables their efficient establishment in new bacterial cells by the process known as conjugation. Whereas many plasmids are fully capable of promoting their own conjugal transfer, others move only with help from coresident elements. The ability of a plasmid to establish itself in a variety of different species is com mon, and recent studies have shown that transfer can in some cases occur from bacterial cells to eukaryotes such as yeast.
During the mid-forties bacteria and phages were dis covered to be suitable objects for the study of genet ics. Genetic phenomena such as mutation and recombina tion, which had already been known in eukaryotes for a long time, were now shown to exist in bacteria and phages as well. New phenomena as lysogeny and trans duction were discovered, which gained great importance beyond the field of microbial genetics. Bacteria and phages are of small size, multiply rapid ly, and have chemically defined growth requirements. Many selective procedures can be applied to screen for rarely occurring mut.