This book contains six chapters, each of which is a self-contained, thorough review by an expert in the field of a particular topic in medicinal chemistry, bacteriology or pharmacology. Each topic is a currently active subject of research in either the quest for new drugs or a better understanding of the role of known biochemical phenomena. In addition, all of the chapters contain an extensive list of relevant reference books, papers and other publications. The book will be of great interest to medicinal and pharmaceutical chemists, and will serve as a valuable source of reference.