DDX23 enzyme (IMAGE) Cold Spring Harbor Laboratory Caption CSHL’s Krainer lab used a technique called live-cell fluorescence imaging to observe the DDX23 enzyme (above, in green) in action. Together with the critical regulator protein SRSF1, DDX23 helps set the stage for RNA splicing. Credit Krainer lab/Cold Spring Harbor Laboratory Usage Restrictions Attribution required 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.