Mouse Liver Tissue (IMAGE) University of Pittsburgh Caption These are mouse liver tissues showing cells surrounding the central vein with active mTOR (red) and glutamine synthetase (green) being present in the same cells (yellow). Credit <i>Cell Reports</i>/University of Pittsburgh Usage Restrictions Use with credit. 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.