Abstract
Recent structural characterization of three proteins, RNA polymerase II, thioredoxin reductase (from E. coli), and chloroplast F1-F0 ATPase, provides exciting additional evidence form Design at the subcellular level. These three proteins possess, as part of their architectural makeup, components that are literally machine parts. These new discoveries add to the growing list of molecular motors (enzyme assemblies responsible for cellular movement) and other enzyme systems that are direct analogs to man-made devices.