Chemists at New York University and Harvard University have created a bipedal, autonomous DNA "walker" that can mimic a cell's transportation system. The device, which marks a step toward more complex synthetic molecular motor systems, is described in the most recent issue of the journal Science. For a video demonstration of the walker, go to
http://www.nyu.edu/public.affairs/videos/qtime/biped_movie.mov.
Two fundamental components of life's building blocks are DNA, which encodes instructions for making proteins, and motor proteins, such as kinesin, which are part of a cell's transportation…