SLC20A1 and colonic neoplasm: Similarly, striking SLC20A1 protein induction was also observed in other cell lines originating from a variety of tissues including bone tumor–derived U-2 OS cells, colon cancer–derived HCT116 cells, and presumably glioblastoma-derived U-87 MG cells (Fig. S2, A–C), indicating that this phenomenon is well conserved and thus biologically relevant.