Virus-Detecting Molecule (1 of 2) (IMAGE) European Molecular Biology Laboratory Caption In the absence of viral RNA, the part of RIG-I that senses viral RNA is exposed (orange), whilst the domains responsible for signalling (blue and pink) are out of reach of the signalling machinery. 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.