Riboswitch 2 (IMAGE) DOE/SLAC National Accelerator Laboratory Caption In experiments at SLAC's Linac Coherent Light Source, riboswitch crystals and adenine molecules were pumped into a mixing chamber, where they were allowed to interact for carefully timed intervals before being injected into the path of the X-ray laser beam. The X-rays bounced off the riboswitch molecules and into a detector, recording any changes in riboswitch structure that took place. Credit Joseph Meyer/National Cancer Institute Usage Restrictions None 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.