Mitochondrion (image) University of California - San Diego Caption This is a transmission electron micrograph of a cell mitochondrion. Credit Thomas Deerinck, National Center for Microscopy and Imaging Research, UC San Diego. Usage Restrictions None 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.