Dr. Jonathan Graff (IMAGE) UT Southwestern Medical Center Caption Dr. Jonathan Graff led a research team which found that a single gene might control whether or not individuals tend to accumulate fat. Credit UT Southwestern Medical Center Usage Restrictions Please use credit line. 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.