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Characterization of stable cell lines. (E,F) Characterization of the KPHBD21 cell line. (E) Time- and 4-OHT-concentration-dependent repression. KPHBD21 cells were treated with vehicle or varying concentrations of 4-OHT for either 0, 12, or 24 h. Fold repression of luciferase activity was determined as above.
