RIF in Breast Cells (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption Time-lapse imaging of DNA damage response to radiation shows that 1.5 minutes after irradiation, the sizes and intensities of radiation induced foci are comparable throughout the nucleus, but 30 minutes later RIF have clustered into larger and brighter regions called DNA repair centers. Credit Courtesy of 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.