Revolving Doors and Efficient Engines: How Proteins Escape a Molecular Tangle | Chemistry | | | | | Weizmann Wonder Wander - News, Features and Discoveries from the Weizmann Institute of Science Trying to untangle a knot in a mess of strings can be frustrating and time-consuming. But not so for molecular machines – molecules that convert chemical energy into mechanical work and motion. Machines from the AAA+ family, which exist in the cells ... [6221 chars]