Filaments that Structure DNA (IMAGE) University of Freiburg Caption After the cell has been treated with a messenger substance (right), the green actin molecules in the red cell nucleus (left) form actin filaments that structure the genome. Credit Robert Grosse 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.