Metabolic Cancer (IMAGE) University of Pennsylvania School of Medicine Caption These are representative immunohistochemistry images of ARG2 or ASS1 protein in primary ccRCC, N = normal, T = tumor. Scale bars represent 100 microns. Credit Celeste Simon, Perelman School of Medicine, University of Pennsylvania, Cell Press 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.