HELICASE (VIDEO) Rice University This video is under embargo. Please login to access this video. Caption A simulation shows how a six-sided helicase protein moves along a strand of DNA as it separates double strands into single strands during replication. Rice University theorists found that ATP hydrolysis is key to the proteins' stair-step motion. One complete step is seen here. Credit Yang Gao/Shikai Jin/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.