Mitchell Han main mCherry image (IMAGE) University of Pennsylvania Caption Shown here: Fluorescence microscopy image showing LNPs delivering fluorescent protein (mCherry) mRNA to brain endothelial cells. Cells are shown in green and their nuclei are shown in blue. Cells that are red were transfected by LNPs, where the newly expressed mCherry protein results in red fluorescence. Credit Emily Han Usage Restrictions Seek permission for re-use from author License Original 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.