Ligand–receptor interaction analysis showed that compared with BAMBIlow DLBCL cells, BAMBIhigh DLBCL cells had stronger TGFB1‐TGFBR2 pair interactions with CD4effector, CD4Treg, and CD4Th1 clusters (Figure 8G). The gene discussed is TGFB1; the disease is diffuse large B-cell lymphoma.