Cryo-ET Image of Replication Spherules (IMAGE) Morgridge Institute for Research Caption This is a cryo-electron tomography image of a mitochondrion associated with virus RNA replication spherules. Credit Ahlquist lab, Morgridge Institute for Research 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.