Proteins: A Structural Biology Perspective covers basic concepts of protein science that is illustrated by practical examples. The book will help biologists bear in mind that to investigate the molecular mechanism of the biological system they have been working on, one should always seek the answer from structural perspective. The book also helps structural biologists and students in the structure field to be aware that a protein structure is a beautiful result of the long molecular evolution. The book focuses on two points: from genomic perspective and from protein-protein interaction view of protein structures.