Stained Slide (IMAGE) Duke University Caption A fluorescent stained image of a tumor marking bacterial nanocarriers in pink, cancer cell nuclei in blue, and human mitochondria (another indicator of tumor cells) in green. Credit Duke University 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.