Virus-Detecting Molecule (2 of 2) (IMAGE) European Molecular Biology Laboratory Caption When RIG-I detects viral RNA (pink helix), it changes shape, and the signalling domains (pink & blue) become accessible to sound the alarm. Credit Image courtesy of EMBL/Cusack Usage Restrictions Appropriate caption and credit required. Image for non-profit and media use only 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.