Salk Researchers Discover that Cutting off Energy Production in Regulatory T Cells Impairs their Fun (image) Salk Institute Share Print E-Mail Caption Skin samples from mice whose regulatory immune cells (Tregs) lack the Lkb1 protein (bottom) are under attack from other immune cells (purple dots) compared to normal mice whose Tregs have the Lkb1 protein (top). Credit Salk Institute Usage Restrictions with credit and related coverage. Share Print E-Mail 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.