Peptides have emerged as a significant part of microbiology. On the basis of their production method, peptides are classified into various segments. Peptides are hence being extensively studied by researchers across the globe. This book takes a closer look at peptides, their production, from functions and other details, aided by inputs from experts in the field who have contributed to the creation of this text. It brings to the fore the latest advancements brought about in this field of study through incessant work done by scholars and researchers from across the world. This book is relevant to students and experts alike.