H2Av and Lipid Droplets (IMAGE) University of Rochester Caption The researchers used advanced fluorescence microscopy to view lipid droplets in fruit fly embryos. Here, H2Av (fluoresced in green) is present in the cell's nuclei (the large blobs) and on lipid droplets (the smaller rings). The lipid droplets regulate how fast H2Av enters a cell's nucleus by storing the H2Av until the nucleus needs it. Credit University of Rochester image / Zhihuan Li 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.