PA63 (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption Computer simulation of an anthrax PA63 protein binding to loopoids (purple). The base nanosheet is shown in green. Credit Ryan Spencer and Ron Zuckermann/Berkeley Lab 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.