How cells control mitochondria (IMAGE) University of Freiburg Caption The network of mitochondria runs like a thread through the entire cell (marked in green and red with fluorescent proteins). The cell nucleus is stained in blue. Credit Pablo Sánchez-Martín/University of Freiburg Usage Restrictions the image may only be used with appropriate caption or credit. 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.