Book excerpt: This volume explores current technologies used to investigate the formation, insertion, and function of metalloclusters associated with proteins. Chapters describe relevant topics about Fe-S cluster metabolism are explored through genetic, biochemical, spectroscopic methods. 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. Authoritative and cutting-edge, Fe-S Proteins: Methods and Protocols aims to be a useful practical guide to researchers to help further their study in this field.