While Btnl2-KO and WT mice exhibited comparable intestinal damage in the early phase of the disease (day 7), as demonstrated by comparable body weight loss and increased myeloperoxidase activity (MPO) levels, a biomarker of intestinal injury and neutrophilia56 (Fig. 7a, d), we observed that Btnl2-KO mice exhibited a significant delay in body weight recovery compared to WT littermates during the repair phase of colitis (Fig. 7a). The gene discussed is MPO; the disease is colitis.