However, Gemei et al. assessed the expression of CD200 in CSCs of five CRC cell lines and found that it is expressed only in a subset of CD133+ cells of the HT29 cell line, while it was completely absent in the other four cell lines (HCT116, Caco2, GEO and LS174T) [92]. The gene discussed is PROM1; the disease is colorectal carcinoma.