ATAP_BSE-2.2 (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption Cartridges containing human cells cultured on ultra-thin mylar sheets (left) are positioned on the cartridge inserter (right) prior to proton irradiation. Credit (Credit: Thor Swift/Berkeley Lab) Usage Restrictions None License Original 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.