This book is a guide for advanced undergraduates, post-graduates and researchers to the fundamental principles in studying kinetics and mechanism of processes concerning proteins. It provides a rare broad overview that concentrates on fundamental principles and understanding underlying the physics and chemistry. It is a single author text by someone who has direct experience in all of the areas covered. Readership: Advanced undergraduates, postgraduates and researchers to the fundamental principle in studying kinetics and mechanism of processes cocerning proteins.