Disappearing T Regs (VIDEO) Rockefeller University This video is under embargo. Please login to access this video. Caption When researchers tracked calming immune cells, known as T regs, they found these cells (red) usually stayed in the tissue below the single-cell lining (blue) of the gut, and when they did enter the lining, many did not return. Credit Laboratory of Mucosal Immunity at The Rockefeller University/Science Usage Restrictions Video may be used only to illustrate the research described in the accompanying release. 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.