With the completion of sequencing projects and the advancement of a- lytical tools for protein identification, proteomics—the study of the expressed part of the genome—has become a major region of the burgeoning field of functional genomics. High-resolution 2-D gels can reveal virtually all p- teins present in a cell or tissue at any given time, including posttranslationally modified proteins. Changes in the expression and structure of most cellular proteins caused by differentiation or external stimuli can be displayed and eventually identified using 2-D protein gels. 2-D Proteome Analysis Protocols covers all aspects of the use of 2-D protein electrophoresis for the analysis of biological problems. The contri- tors include many of the leaders in the fields of biochemistry and analytical chemistry who were instrumental in the development of high-resolution 2-D gels, immobilized pH gradients, computer analysis, and mass spectromet- based protein identification methodologies. This book is intended as a benchtop manual and guide both for novices to 2-D gels and for those aficionados who wish to try the newer techniques. Any group using protein biochemistry—especially in the fields of molecular biology, biochemistry, microbiology, and cell biology—should find this book eminently useful. 2-D Proteome Analysis Protocols takes the researcher through the c- plete process of working with 2-D protein gels from making the protein - tract to finally identifying the proteins of interest. It includes protocols for generating 2-D protein extracts from most of the standard model organisms, including bacteria, yeast, nematode, Drosophila, plants, mouse, and human.

The human genome and other large-scale genome sequencing projects have inevitably led to a focus on the proteins encoded by genes. The field of proteomics has grown enormously as a result and a number of high-throughput technologies have now been developed allowing discovery-led investigations of protein populations rather than more traditional hypothesis-led studies on single proteins. These high-throughput techno- gies include gene and protein microarrays, the yeast two-hybrid system, and various mass spectrometry methodologies. However, despite developments and improvements in these technologies, two-dimensional electrophoresis (2DE) remains one of the most widely used approaches. This technique was revolutionised by the development of immobilised pH gradient strips which are now commercially available. This has made possible highly reproducible separations of matched samples. Developments in staining, mass spectr- etry, and bioinformatics supported these developments and have led to a measure of standardisation in design, execution, and analysis of proteomics experiments. This book began life as a proposed update of the excellent volume 2DE Protocols edited by Andrew Link of the University of Washington at Seattle. However, we re- ised that 2DE has undergone major development in aspects of its technology in recent years and we were anxious to reflect these in the present volume. We are also conscious that many researchers have now begun to apply proteomics methodologies to a growing range of biological material and we were anxious to include contributions to reflect the challenges posed in sample preparation in less widely used organisms.

The human genome and other large-scale genome sequencing projects have inevitably led to a focus on the proteins encoded by genes. The field of proteomics has grown enormously as a result and a number of high-throughput technologies have now been developed allowing discovery-led investigations of protein populations rather than more traditional hypothesis-led studies on single proteins. These high-throughput techno- gies include gene and protein microarrays, the yeast two-hybrid system, and various mass spectrometry methodologies. However, despite developments and improvements in these technologies, two-dimensional electrophoresis (2DE) remains one of the most widely used approaches. This technique was revolutionised by the development of immobilised pH gradient strips which are now commercially available. This has made possible highly reproducible separations of matched samples. Developments in staining, mass spectr- etry, and bioinformatics supported these developments and have led to a measure of standardisation in design, execution, and analysis of proteomics experiments. This book began life as a proposed update of the excellent volume 2DE Protocols edited by Andrew Link of the University of Washington at Seattle. However, we re- ised that 2DE has undergone major development in aspects of its technology in recent years and we were anxious to reflect these in the present volume. We are also conscious that many researchers have now begun to apply proteomics methodologies to a growing range of biological material and we were anxious to include contributions to reflect the challenges posed in sample preparation in less widely used organisms.

With the end of the Human Genome Project in sight, the next important step is to determine the function of genes. Proteome Research is an important approach to this study and is the first book to comprehensively cover the application of two-dimensional electrophoresis, the central methodology in proteome research. The state-of-the-art is described in detail and the available detection methods are extensively covered. Sufficient detail is given to allow readers to apply these technologies to their own particular requirements.

The second edition of this volume provides a comprehensive update of this key method on gel-based proteomics. Chapters present an introduction into the development of methods on principles of differential protein labeling and two-dimensional gel electrophoresis, techniques on optimized proteomic workflows using advanced mass spectrometry for protein identification, and the application of those methods in basic biological research, pathobiology and applied biomarker discovery. 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, Difference Gel Electrophoresis: Methods and Protocols, Second Edition aims to ensure successful results in the further study of this vital field.

Due to continuous technical developments and new insights into the high complexity of neurological diseases, there is an increasing need for the application of proteomic technologies which can yield potential biomarker readouts for improved clinical management as well as for the development of new drugs by struggling pharmaceutical companies. This book describes the step-by-step use of proteomic methods such as two-dimensional gel electrophoresis, multiplex immunoassay, liquid chromatography mass spectrometry (LC-MS) and selective reaction monitoring MS, to increase our understanding of these diseases, with the ultimate aim of improving patient care. The volume will be of high interest to clinical scientists, physicians and pharmaceutical company scientists as it gives insights into the latest technologies enabling the revolution of personalized medicine. It is of direct interest to both technical and bench biomarker scientists as it gives step by step instructions on how to carry out each of the protocols. It is also of interest to researchers as each technique will be presented in the context of a specific neurological disorder, including Alzheimer's disease, multiple sclerosis, autism spectrum disorders, schizophrenia, major depressive disorder and bipolar disorder. Finally, it will also highlight the future research efforts in this field, which are endeavoring to convert proteomic platforms to the form of hand held devices which can be used in a point of care setting and return diagnostic results within the timeframe of a visit to the general practitioner.

This text is a summary of basic principles and techniques and is dedicated to all those students who have been told by their mentors, "Go forth and do two-dimensional gels and have the results on my desk tomorrow. " No attempt has been made in this text to provide exhaustive lists of references related to basic principles or techniques or to list every com pany or supplier involved in this area of research. Nevertheless, it is hoped that sufficient information is given to help a new investigator or student appreciate the complexities but develop sufficient expertise to carry out these techniques successfully. The discussions are designed to instill in basic science and clinical investigators of all levels of expertise an appreciation of the power of combining a variety of techniques as well as to provide basic insight into the theories, complexities, and problems frequently encountered with electrophoretic and immunochemical meth ods. Bonnie S. Dunbar Houston v Acknowledgments I wish to thank my students and staff for their patience and support throughout the preparation of this text. I would like to acknowledge my appreciation for my extensive discussions with Dr. David Sammons (Uni versity of Arizona) and to Dr. N. L. and Dr. N. G. Anderson and their colleagues (Argonne National Laboratory) for their invaluable advice and suggestions in this area over the years. I thank my research assistant, Ms.