Illustration of in vitro circadian clock (IMAGE) University of California - Santa Cruz Caption A team of UC scientists reconstituted the circadian clock of cyanobacteria in a test tube, enabling them to study the molecular interactions of the clock proteins in real time and understand how these interactions enable the clock to exert control over gene expression. Credit Andy LiWang Usage Restrictions For use only with news coverage of this research 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.