DNA 2 (IMAGE) Rice University Caption Researchers Gang Bao and Julie Park prepare to sequence a sample at their Rice University lab. They led a study to reveal potential threats to the efficacy of CRISPR-Cas9 gene editing from unseen changes that accompany on-target edits. Credit Jeff Fitlow/Rice University Usage Restrictions None License Original 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.