Molecular Movie (IMAGE) Paul Scherrer Institute Caption Tobias Weinert, biochemist at PSI, with the experimental set-up for the 'excitation query' crystallography at the SLS: An injector produces a 50 micrometer (like a hair) thin stream of a toothpaste-like mass with the protein crystals grown in it. A small laser diode, comparable to a conventional laser pointer, is guided over mirrors and lenses and focused to the same point where the X-ray beam of the SLS hits (not in the picture). For the photo, the laser was made visible by liquid nitrogen. In the experiment, the laser is then activated for a short moment, followed by the X-rays for the molecular film. Credit Paul Scherrer Institute/Markus Fischer Usage Restrictions All media, such as photos, graphics and videos may only be used in the editorial context of these contents, naming the author. Archiving of this media is not permitted. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.