Salk Scientists Discover How Mitochondria Recover after Damage (video) Salk Institute Share Print E-Mail Loading video... Caption The video shows mitochondria of a cell treated with the toxin rotenone. In as little as 30 minutes, the mitochondrial network is reorganized into smaller particles, a process called mitochondrial fragmentation. Scientists at the Salk Institute have provided a molecular explanation for this phenomenon by showing that activation of a master regulating enzyme called AMPK was required for mitochondrial fragmentation during energy stress. Credit Salk Institute Usage Restrictions with credit and related coverage. Share Print E-Mail 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.