CD4 and inflammatory bowel disease: As shown in our previous study [9], the expression levels of K2P5.1 and interferon (IFN)-γ transcripts in CD4+ T cells were higher in IBD model mice than in normal mice (n = 4 mice for each group, p = 0.0000 and p = 0.0002 for K2P5.1 and IFN-γ, respectively) (Supplementary Figure S1A,B).