HCT116 CRC cell lines were obtained from ATCC (catalog # CCL-247). The isogenic HCT116 PIK3CA WT and mutant only cell lines were kind gifts from Dr. Bert Vogelstein at John Hopkins University. These cell lines were cultured in McCoy’s 5A medium containing 10% fetal bovine serum as described previously27. The tissue cultures were routinely checked to ensure free of mycoplasma contamination. The cell lines were authenticated by the Genetica DNA Laboratories using STR profiling.
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