Ametabolic Enzyme In An Unexpected Role (image) University of Pennsylvania School of Medicine Caption A metabolic enzyme has an unexpected role in regulating gene expression in kidney cancer. Image of primary human kidney tissue: FBP1 protein (green); cell nuclei (blue). Credit Credit: Bo Li and Brian Keith, Perelman School of Medicine, University of Pennsylvania. Usage Restrictions None 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.