KLF2 and gastric cancer: We observed that KLF2 expression in diffuse-type epithelial cells (EpiC cluster) was positively correlated with plasma cell proportions, and increased KLF2 expression in diffuse-type and GS gastric cancers (Supplementary Table S15) in the TCGA cohort was consistent with a regulatory role for epithelial KLF2 in shaping plasma cell populations.