We performed an additional screen of 11 colon cancer cell lines with either MSI (DLD1, HCA7, HCT15, LoVo, LS174, SNU175, SNU407), or MSS (SNU81, SNU503, SW480, and T84) backgrounds revealing similar levels of ACVR2 mRNA and establishing HT29 as the only observed MSS colon cancer model with distinct ACVR2 loss. The gene discussed is ACVR2A; the disease is malignant colon neoplasm.