In the Fluorescence Microscope (IMAGE) University of Bonn Caption The image shows the immunofluorescence staining of human endothelial cells, with the cell nucleus in blue, certain cytoplasmic markers (constituents of the cytoskeleton) in red, and the protein hnRNPU in green. Credit (c) Herzzentrum UKB Usage Restrictions This image may be used together with the press release. 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.