Contrary to its name, the "regenerating" function of REG su4 is subtle but critical. Following chemical or mechanical injury to the colonic epithelium, REG su4 expression spikes. It promotes the proliferation of intestinal stem cells and accelerates wound healing by activating the . This makes REG su4 a key player in recovery from inflammatory bowel diseases (IBD), such as Crohn’s disease and ulcerative colitis.

If you were using the SU4 Beta, you can return to the live build by right-clicking Microsoft Flight Simulator 2024 in your Steam Library, selecting Properties > Betas , and choosing "None" .