This volume provides references for methods about the proteomics of microbial communities, also called metaproteomics. Chapters guide readers first through specific protein extractions from different environments and/or ecological niches crowded by heterogeneous microbial communities, then deepening the possible complete metaproteomic workflows in several situations or conditions. 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 prools, and key tips on troubleshooting and avoiding known pitfalls. Authoritative and cutting—edge, Metaproteomics: Methods and Prools aims to ensure successful results in the further study of this vital field.