IF assays showed co‐localization of DRD4 with transforming growth factor beta receptor 1 (TGFBR1) and transforming growth factor beta receptor 2 (TGFBR2) in HCT116 cells (Figure 6C) and clinical CRC samples (Figure S7A, Supporting Information). Here, TGFBR2 is linked to colorectal carcinoma.