New Function for DNA Repair Protein (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption The scientists found that genome instability increases in cells as XPG levels decrease. The green spots mark locations of DNA double-strand breaks. The left image shows normal human cells and the right image shows XPG-depleted cells. Credit 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.