HT-29, 293T, DLD-1, and HCT-8 cells were obtained from the American Type Culture Collection (ATCC) and cultured according to their recommendations. The 5E clone of MCF10A cells was cultured as described previously (119 (link)). AC16 cells (110 (link)) were purchased from M. Davidson (Columbia University) and cultured in Dulbecco’s modified Eagle’s medium/F-12 medium (Life Technologies) with 12.5% tetracycline-free fetal bovine serum (Clontech) and penicillin-streptomycin (Gibco).