FEN1 uses a Two-Step Process to Repair Damaged DNA (IMAGE) King Abdullah University of Science & Technology (KAUST) Caption FEN1 uses a two-step verification mechanism before repairing DNA damage. Credit © 2017 Samir Hamdan 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.