G quadruplexes (IMAGE) La Jolla Institute for Immunology Caption Diagrammatic representation of a G-quadruplex (G4) with an associated R-loop structure, illustrating the reagents used for detection of G-quadruplexes and R-loops. Credit Shukla et al Usage Restrictions None License Original 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.