This book focuses on peptides as drugs, a growing area of pharmaceutical research and development. It helps readers solve problems of discovering, developing, producing, and delivering peptide-based drugs. • Identifies promising new areas in peptide drug discovery • Includes chapters on discovery from natural sources, metabolic modification, and drug delivery • Overviews separation methods and techniques for analysis, bond formation, and purification • Offers readers both a professional reference and a text or resource for graduate-level students