This detailed collection explores recent advances in molecular imaging techniques involving bioluminescence, currently employed in biolaboratories around the world. Volume 2 delves into techniques for heterogeneous conjugates, protein fragment-complementation assays, BRET-based imaging, as well as instrumentation and software. Written for the highly successful Methods in Molecular Biology series, 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 comprehensive, Bioluminescence: Methods and Protocols, Fourth Edition, Volume 2 presents practical guidance for researchers and technical staff on how to proceed with bioluminescence studies in their laboratories.