siRNA (2 of 2) (IMAGE) University of Washington Caption A fluorescent image of the cell taken four hours into the same experiment. At this time the quantum dot-siRNA complex is distributed throughout the cellular fluid. The dark region in the middle of the cell is the nucleus. Credit University of Washington 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.