Download or read book Isolation and Preliminary Characterization of a New Temperature sensitive Allele of the NAD dependent Ligase Gene ligA in Escherichia Coli written by Hadi Mohamad Yassine and published by . This book was released on 2003 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: Temperature-sensitive (Ts) mutants are considered a valuable tool to study the functional properties of many essential proteins in Escherichia coli. These include protein-protein interactions, DNA-protein interactions, protein localization and the characterization of functional domains in proteins. Using P I-mediated localized mutagenesis, we were able to generate a number of Ts mutants by targeting genes at the 54.4 minutes on Escherichia coli chromosome. One of which, termed LS3533 was isolated for further testing. This 54.4 minutes locus on the Escherichia coli chromosome carries two essential genes that are involved in cell cycle. The genes are: zipA (a cell division gene) and ligA (encoding DNA ligase gene). Characterization of the mutant gene was carried out by two steps. First, through mapping the mutation using P-I transductions and second by complementing the Ts phenotype (observed at 42 C) through transforming the mutant strain with a plasmid that carries a wild type copy of the affected gene. Parallel to the identification process, the isolated strain was subjected to several physiological studies including phenotypic observation, chromosome patterns visualization, FtsZ localization and SOS response testing. Our findings demonstrated that the temperature-sensitive phenotype in isolate Ls3533 was due to a mutation in the ligA gene. The block to division at 42 C in this strain was shown to be a consequence of the induction of the SOS-response in a lexA-dependent but sfiA-independent fashion, in which the localization of the essential division protein FtsZ, to the division site is prohibited.
Download or read book Directed Enzyme Evolution written by Frances H. Arnold and published by Springer Science & Business Media. This book was released on 2008-02-02 with total page 381 pages. Available in PDF, EPUB and Kindle. Book excerpt: Directed evolution comprises two distinct steps that are typically applied in an iterative fashion: (1) generating molecular diversity and (2) finding among the ensemble of mutant sequences those proteins that perform the desired fu- tion according to the specified criteria. In many ways, the second step is the most challenging. No matter how cleverly designed or diverse the starting library, without an effective screening strategy the ability to isolate useful clones is severely diminished. The best screens are (1) high throughput, to increase the likelihood that useful clones will be found; (2) sufficiently sen- tive (i. e. , good signal to noise) to allow the isolation of lower activity clones early in evolution; (3) sufficiently reproducible to allow one to find small improvements; (4) robust, which means that the signal afforded by active clones is not dependent on difficult-to-control environmental variables; and, most importantly, (5) sensitive to the desired function. Regarding this last point, almost anyone who has attempted a directed evolution experiment has learned firsthand the truth of the dictum “you get what you screen for. ” The protocols in Directed Enzyme Evolution describe a series of detailed p- cedures of proven utility for directed evolution purposes. The volume begins with several selection strategies for enzyme evolution and continues with assay methods that can be used to screen enzyme libraries. Genetic selections offer the advantage that functional proteins can be isolated from very large libraries s- ply by growing a population of cells under selective conditions.
Download or read book Restriction Endonucleases written by Alfred Pingoud and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt: Restriction enzymes are highly specific nucleases which occur ubiquitously among prokaryotic organisms, where they serve to protect bacterial cells against foreign DNA. Many different types of restriction enzymes are known, among them multi-subunit enzymes which depend on ATP or GTP hydrolysis for target site location. The best known representatives, the orthodox type II restriction endonucleases, are homodimers which recognize palindromic sequences, 4 to 8 base pairs in length, and cleave the DNA within or immediately adjacent to the recognition site. In addition to their important biological role (up to 10 % of the genomes of prokaryotic organisms code for restriction/modification systems!), they are among the most important enzymes used for the analysis and recombination of DNA. In addition, they are model systems for the study of protein-nucleic acids interactions and, because of their ubiquitous occurence, also for the understanding of the mechanisms of evolution.
Download or read book Genome Mapping and Genomics in Animal Associated Microbes written by Vishvanath Nene and published by Springer Science & Business Media. This book was released on 2008-11-24 with total page 253 pages. Available in PDF, EPUB and Kindle. Book excerpt: Achievements and progress in genome mapping and the genomics of microbes supersede by far those for higher plants and animals, in part due to their enormous economic implication but also smaller genome size. In the post-genomic era, whole genome sequences of animal-associated microbes are providing clues to depicting the genetic basis of the complex host-pathogen relationships and the evolution of parasitism; and to improving methods of controlling pathogens. This volume focuses on a globally important group of intracellular prokaryotic pathogens which affect livestock animals. These include Brucella, Mycobacterium, Anaplasma and Ehrlichia, as well as the protozoan pathogens Cryptosporidium and Theileria, for which genome sequence data is available. Insights from comparative genomics of the microbes described provide clues to the adaptation involved in host-microbe interactions, as well as resources potentially useful for application in future research and product development.
Download or read book Heterologous Gene Expression in E coli written by Nicola A. Burgess-Brown and published by Humana Press. This book was released on 2018-07-20 with total page 429 pages. Available in PDF, EPUB and Kindle. Book excerpt: This detailed volume provides a toolbox for designing constructs, tackling expression and solubility issues, handling membrane proteins and protein complexes, and exploring innovative engineering of E. coli. The topics are largely grouped under four parts: high-throughput cloning, expression screening, and optimization of expression conditions, protein production and solubility enhancement, case studies to produce challenging proteins and specific protein families, as well as applications of E. coli expression. Written for the highly successful Methods in Molecular Biology series, chapters include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step, readily reproducible laboratory protocols, and tips on troubleshooting and avoiding known pitfalls. Authoritative and practical, Heterologous Gene Expression in E. coli: Methods and Protocols serves molecular biologists, biochemists and structural biologists, those in the beginning of their research careers to those in their prime, to give both an historical and modern overview of the methods available to express their genes of interest in this exceptional organism.
Download or read book Chemokine Protocols written by Amanda E.I. Proudfoot and published by Humana. This book was released on 2010-11-10 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The chemokines family of small proteins are involved in numerous b- logical processes ranging from hematopoiesis, angiogenesis, and basal l- kocyte trafficking to the extravasation and tissue infiltration of leukocytes in response to inflammatory agents, tissue damage, and bacterial or viral infection. Chemokines exert their effects through a family of seven G-protein coupled transmembrane receptors. Worldwide interest in the chemokine field surged dramatically early in 1996, with the finding that certain chemokine receptors were the elusive coreceptors, required along with CD4, for HIV infection. Today, though over 40 human chemokines have been described, the n- ber of chemokine receptors lags behind—only 17 human chemokine receptors have been identified so far. What has emerged over the years is that most chemokine receptors bind several distinct ligands, and indeed the majority of chemokines are able to bind to multiple chemokine receptors, explaining to some extent the apparent disparity in the numbers of chemokines and rec- tors. Yet in spite of the apparent redundancy in chemokine/chemokine rec- tor interactions, it is clear that in vivo, spatial, temporal, and indeed cell- and tissue-specific expression of both chemokines and their receptors are imp- tant factors in determining the precise nature of cellular infiltrates in phy- ological and pathological processes.
Download or read book An Introduction to Genetic Engineering written by Desmond S. T. Nicholl and published by Cambridge University Press. This book was released on 2002-02-07 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: The author presents a basic introduction to the world of genetic engineering. Copyright © Libri GmbH. All rights reserved.
Download or read book Physiological Genetics written by John G. Scandalios and published by Academic Press. This book was released on 2014-04-24 with total page 293 pages. Available in PDF, EPUB and Kindle. Book excerpt: Physiological Genetics is a compilation of developments, contributed by experts in the field of physiological genetics. The articles contained in the book covers various accounts of developments in the field. The book starts with an introductory chapter describing genetic factors in developmental gene regulation, followed by discussions on enzyme differentiation, hormonal control of gene expression, biochemical genetics of morphogenesis, cytoplasmic male sterility in maize, plant somatic cell genetics, and the population dynamics of genetic polymorphism. Physiologists, biologists, geneticists, and students will find a valuable reference material.
Download or read book Nanotechnology in Diagnosis Treatment and Prophylaxis of Infectious Diseases written by Mahendra Rai and published by Academic Press. This book was released on 2015-05-23 with total page 341 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanotechnology in Diagnosis, Treatment and Prophylaxis of Infectious Diseases delivers comprehensive coverage of the application of nanotechnology to pressing problems in infectious disease. This text equips readers with cutting-edge knowledge of promising developments and future prospects in nanotechnology, paying special attention to microbes that are now resistant to conventional antibiotics, a concerning problem in modern medicine. Readers will find a thorough discussion of this new approach to infectious disease treatment, including the reasons nanotechnology presents a promising avenue for the diagnosis, treatment, and prophylaxis of infectious diseases. - Provides a comprehensive overview of the use of nanotechnology in the treatment and diagnosis of infectious diseases - Covers all common types of infective agents, including bacteria, viruses, fungi, and protozoa, along with their vectors, ticks, mosquitoes, flies, etc. - Delivers commentary from an international researcher base, providing insights across differing economic statuses - Includes a foundation of basic nanotechnological concepts to aid in designing new strategies to combat several pathogenic diseases and cancer - Illustrates the high antimicrobial potential of nanoparticles, ultimately demonstrating how they are a promising alternative class that can be successfully used in fighting a myriad of infections
Download or read book Plant Biotechnology and Genetics written by C. Neal Stewart, Jr. and published by John Wiley & Sons. This book was released on 2012-12-13 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt: Designed to inform and inspire the next generation of plant biotechnologists Plant Biotechnology and Genetics explores contemporary techniques and applications of plant biotechnology, illustrating the tremendous potential this technology has to change our world by improving the food supply. As an introductory text, its focus is on basic science and processes. It guides students from plant biology and genetics to breeding to principles and applications of plant biotechnology. Next, the text examines the critical issues of patents and intellectual property and then tackles the many controversies and consumer concerns over transgenic plants. The final chapter of the book provides an expert forecast of the future of plant biotechnology. Each chapter has been written by one or more leading practitioners in the field and then carefully edited to ensure thoroughness and consistency. The chapters are organized so that each one progressively builds upon the previous chapters. Questions set forth in each chapter help students deepen their understanding and facilitate classroom discussions. Inspirational autobiographical essays, written by pioneers and eminent scientists in the field today, are interspersed throughout the text. Authors explain how they became involved in the field and offer a personal perspective on their contributions and the future of the field. The text's accompanying CD-ROM offers full-color figures that can be used in classroom presentations with other teaching aids available online. This text is recommended for junior- and senior-level courses in plant biotechnology or plant genetics and for courses devoted to special topics at both the undergraduate and graduate levels. It is also an ideal reference for practitioners.
Download or read book Biologics Biosimilars and Biobetters written by Iqbal Ramzan and published by John Wiley & Sons. This book was released on 2021-02-03 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive primer and reference, this book provides pharmacists and health practitioners the relevant science and policy concepts behind biologics, biosimilars, and biobetters from a practical and clinical perspective. Explains what pharmacists need to discuss the equivalence, efficacy, safety, and risks of biosimilars with physicians, health practitioners, and patients about Guides regulators on pragmatic approaches to dealing with these drugs in the context of rapidly evolving scientific and clinical evidence Balances scientific information on complex drugs with practical information, such as a checklist for pharmacists
Download or read book Aquaculture Genome Technologies written by Zhanjiang (John) Liu and published by John Wiley & Sons. This book was released on 2008-02-28 with total page 579 pages. Available in PDF, EPUB and Kindle. Book excerpt: Genomics is a rapidly growing scientific field with applications ranging from improved disease resistance to increased rate of growth. Aquaculture Genome Technologies comprehensively covers the field of genomics and its applications to the aquaculture industry. This volume looks to bridge the gap between a basic understanding of genomic technology to its practical use in the aquaculture industry.
Download or read book Genome Stability written by Igor Kovalchuk and published by Academic Press. This book was released on 2021-07-17 with total page 762 pages. Available in PDF, EPUB and Kindle. Book excerpt: Genome Stability: From Virus to Human Application, Second Edition, a volume in the Translational Epigenetics series, explores how various species maintain genome stability and genome diversification in response to environmental factors. Here, across thirty-eight chapters, leading researchers provide a deep analysis of genome stability in DNA/RNA viruses, prokaryotes, single cell eukaryotes, lower multicellular eukaryotes, and mammals, examining how epigenetic factors contribute to genome stability and how these species pass memories of encounters to progeny. Topics also include major DNA repair mechanisms, the role of chromatin in genome stability, human diseases associated with genome instability, and genome stability in response to aging. This second edition has been fully revised to address evolving research trends, including CRISPRs/Cas9 genome editing; conventional versus transgenic genome instability; breeding and genetic diseases associated with abnormal DNA repair; RNA and extrachromosomal DNA; cloning, stem cells, and embryo development; programmed genome instability; and conserved and divergent features of repair. This volume is an essential resource for geneticists, epigeneticists, and molecular biologists who are looking to gain a deeper understanding of this rapidly expanding field, and can also be of great use to advanced students who are looking to gain additional expertise in genome stability. - A deep analysis of genome stability research from various kingdoms, including epigenetics and transgenerational effects - Provides comprehensive coverage of mechanisms utilized by different organisms to maintain genomic stability - Contains applications of genome instability research and outcomes for human disease - Features all-new chapters on evolving areas of genome stability research, including CRISPRs/Cas9 genome editing, RNA and extrachromosomal DNA, programmed genome instability, and conserved and divergent features of repair
Download or read book Leukemia written by Chi Wai Eric So and published by Humana Press. This book was released on 2009-04-01 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent advances in molecular and cellular biology techniques have significantly improved our ability to detect, monitor, model and study the underlying molecular basis and pathogenesis of leukemia, yet we are still in an early discovery stage and much more work is needed in order to develop better strategies to diagnose, classify and treat this biologically and clinically diverse disease. In Leukemia: Methods and Protocols, expert researchers bring together a wide range of state-of-the-art laboratory methods and detailed protocols that are useful for both clinical and basic research scientists working on the disease. The volume provides techniques for prenatal backtracking of leukemic clone, molecular diagnosis, detection of genome-wide genetic abnormalities and profiling, identification of unknown fusion genes, monitoring of minimal residual diseases, disease modeling using murine and human primary hematopoietic cells, studying of normal and malignant hematopoiesis, identification of interacting partners with leukemia associated oncoproteins, and global characterization of genome-wide epigenetic changes in leukemic cells. Written in the highly successful Methods in Molecular BiologyTM series format, the convenient chapters contain brief introductions, lists of the necessary materials, step-by-step, readily reproducible protocols, and notes on troubleshooting and avoiding known pitfalls. Comprehensive and cutting-edge, Leukemia: Methods and Protocols will help researchers to advance knowledge and have a better understanding of the disease, which will ultimately facilitate development of anti-cancer therapy and improve quality of life for patients.
Download or read book Gene Expression Analysis written by Nalini Raghavachari and published by Humana. This book was released on 2018-05-17 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume provides experimental and bioinformatics approaches related to different aspects of gene expression analysis. Divided in three sections chapters detail wet-lab protocols, bioinformatics approaches, single-cell gene expression, highly multiplexed amplicon sequencing, multi-omics techniques, and targeted sequencing. Written in the highly successful Methods in Molecular Biology series format, chapters include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step, readily reproducible laboratory protocols, and tips on troubleshooting and avoiding known pitfalls. Authoritative and cutting-edge, Gene Expression Analysis: Methods and Protocols aims provide useful information to researchers worldwide.
Download or read book Mycoplasma Protocols written by Roger J. Miles and published by Springer Science & Business Media. This book was released on 1998-05-25 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a collection of cutting-edge mycoplasma methods for the detection, isolation, identification, characterization, and genetic manipulation of the pathogenic mycoplasmas. These step-by-step methods are crafted for successful reproducibility and include biochemical, genetic, and molecular techniques essential to understanding pathogenecity and adhesion to host cells. They also cover the detection of mycoplasmas in cell cultures, an important tool not only in viral diagnosis and research, but also in the production of vaccines and various biological products.
Download or read book Gene Cloning and DNA Analysis written by T. A. Brown and published by John Wiley & Sons. This book was released on 2013-04-25 with total page 337 pages. Available in PDF, EPUB and Kindle. Book excerpt: Known world-wide as the standard introductory text to this important and exciting area, the sixth edition of Gene Cloning and DNA Analysis addresses new and growing areas of research whilst retaining the philosophy of the previous editions. Assuming the reader has little prior knowledge of the subject, its importance, the principles of the techniques used and their applications are all carefully laid out, with over 250 clearly presented four-colour illustrations. In addition to a number of informative changes to the text throughout the book, the final four chapters have been significantly updated and extended to reflect the striking advances made in recent years in the applications of gene cloning and DNA analysis in biotechnology. Gene Cloning and DNA Analysis remains an essential introductory text to a wide range of biological sciences students; including genetics and genomics, molecular biology, biochemistry, immunology and applied biology. It is also a perfect introductory text for any professional needing to learn the basics of the subject. All libraries in universities where medical, life and biological sciences are studied and taught should have copies available on their shelves. "... the book content is elegantly illustrated and well organized in clear-cut chapters and subsections... there is a Further Reading section after each chapter that contains several key references... What is extremely useful, almost every reference is furnished with the short but distinct author's remark." –Journal of Heredity, 2007 (on the previous edition)
