Mice Lacking L-Fabp Gene (IMAGE) Washington University School of Medicine Caption Mice lacking the L-Fabp gene (left) don't become obese on a high-fat diet like normal mice. But while they remain lean, the L-Fabp mice do develop gallstones at high rates. Credit Washington University School of Medicine 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.