Structure of the U6 Complex (IMAGE) University of Wisconsin-Madison Caption U6 RNA is red and the four RRMs of Prp24 protein are beige, orange, aqua and purple, with linkers in gray. Credit Brow and Butcher Labs Usage Restrictions None License Licensed 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.