Chromosome (IMAGE) University of Vienna Caption Scientists have now discovered that cells sometimes liberate DNA fragments at sites of paired, or double, DSBs. Credit © Franz Klein, Chromosomenbiologie, Universität Wien 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.