This volume provides an understanding of how an immunoassay works, detailing the strengths, weaknesses, pitfalls. Chapters guide readers on how and when to appropriately utilize this powerful tool, examples of where the ELISA or similar immunoassay formats are currently being used, and newer techniques that may have a significant impact on future applications. Written in the format of the highly successful Methods in Molecular Biology series, each chapter includes an introduction to the topic, lists necessary materials and reagents, includes tips on troubleshooting and known pitfalls, and step-by-step, readily reproducible protocols. Authoritative and cutting-edge, ELISA: Methods and Protocols is a valuable resource for both novice and expert scientists in this developing field.