Nano Letters Cover (image) University of California - San Diego Caption Nanoengineers at the University of California, San Diego have developed a nanoshell to protect foreign enzymes used to starve cancer cells as part of chemotherapy. Credit Posted with permission from Nano Letters, June 2014, 14(6). Copyright 2014 American Chemical Society. Usage Restrictions with credit 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.