FMRP in Mouse Astrocyte (IMAGE) University of California - Santa Cruz Caption Green marks the fragile X mental retardation protein (FMRP) in a mouse cortical astrocyte (a type of glial cell that supports neurons in the brain) growing in cell culture. The cell nucleus is labeled blue and F-actin (a component of the cell's cytoskeleton) is labeled red. Credit Yi Zuo Usage Restrictions For use only with news coverage of this research 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.