DNA bridges (IMAGE) The University of Hong Kong Caption The study reveals RIF1-PP1 prevents BLM from unwinding the ultrafine DNA bridges. Credit Dr Gary Ying Wai CHAN Usage Restrictions N/A 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.