XPG Model (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption Structural models of a discontinuous DNA strand (left) and a discontinuous strand bent by a bound XPG catalytic core are overlaid on an electron micrograph of full-length XPG protein bound to a central bubble of discontinuous DNA. Credit Jack Griffith/UNC Chapel Hill and Susan Tsutakawa/Berkeley Lab Usage Restrictions Use credit 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.