This volume explores the uses of RNAi and CRISPR interferences as a general method for inhibiting gene expression, with focus on their biological functions, design, chemical modifications, delivery, and preclinical/clinical applications. In addition to relevant backgrounds, the chapters in this book discuss simple and accurate protocols dealing with the latest advances in RNAi and CRISPR applications and look at how these methods differ from one another. 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.