Salk Shadel Nature Met Sci Image (image) Salk Institute Share Print E-Mail Caption Pictured are mitochondria (red), cell nuclei (blue) and mtDNA (white dots). Credit Salk Institute/Waitt Advanced Biophotonics Center 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.