This book seeks to fill in the current technology gap with a specific collection of technologies developed for the study of protein function at a proteome scale. Chapters explore topics from protein functions to other aspects of protein analysis, especially in post-translational modification, as most proteomes use this mechanism in some capacity to carry out their unique role in cellular regulation. By comparing functional proteomes, this presents a bridge to other levels of system biology research including genomics and metabolomics in order to provide readers with a relatively complete picture for how one might study the biological system of their interest. Written in the highly successful Methods in Molecular Biology series format, chapters include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step, readily reproducible laboratory protocols, and tips on troubleshooting and avoiding known pitfalls. Authoritativeand cutting-edge, Functional Proteomics: Methods and Protocols collects these novel technologies in the hope that new frontiers in biological research will be created, important drug targets can be identified, and clinically validated biomarkers and diagnostic tests can be further developed.