Functionally, proteins are the most important building blocks of life. Their diverse biological activities are often intricately linked to their internal mobility. Model-free analysis of NMR relaxation data is the most widely employed method for experimentally studying protein dynamics at the atomic level. This book investigates all aspects of the model-free data analysis chain, and shows how to obtain a much improved dynamic description of macromolecules. Using statistical model selection the choice of model-free model is overhauled to uncover previously hidden motions, failed model-free...