Interest in molecular chaperones has grown exponentially over the last decade. Molecular Chaperones recognise nascet and unfolded polypeptide chains and are often essential for their folding, proteolytic processing, intracellular targeting, and secretion. They are vital for cell growth, withkey roles in processes as diverse as signal transduction and stress survival. Much work has already been done in understanding the structure and function of the major molecular chaperones, and more recently the emphasis in research has shifted towrd exploring their precise roles in many differentprocesses with which they are involved inside the cell. This aspect of molecular chaperone biology is the focus of this book. Here, the field's leading experts synthesise our body of knowledge into succinct chapters, and the reader gains not only a fuller understanding of the roles of chaperones inthe context of cellular processes, but also an insight into the nature of these proteins and their breath of definition. This book represents an invaluable summary of the state of research in this fast moving highly important branch of molecular biology, which has ramifications for understanding notonly many diverse cellular processes, but also give important insights into diseases such as BSE, CJD, and Alzhemier's disease, which invole protein misfolding.