This volume arranged into three sections describes biochemical, in vitro, and in vivo protocols on Semaphorins. Chapters focus on approaches that would allow the novice to study Semaphorins and employ robust assays to characterize mechanisms of action. 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, Semaphorin Signaling: Methods and Protocols aims to ensure successful results in the further study of this vital field.