This volume expands on the previous edition with a more extensive look at molecular motors and their roles in muscle contractions, vesicle transport, flagellar beating, chromosome segregation, and DNA replication and repair. The chapters in this book are divided into three parts: Part One looks at membrane motors, such as the bacterial flagellar rotary motor; Part Two discusses cytoskeletal motors, such as kinesin and myosin; and Part Three talks about nucleic acid motors, such as DNA polymerases, helicases, and nucleosome remodelers. 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.