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CYP 3A4, 1A1 and 2C9 activities of OTCD-PHH. The assays were carried out following the protocol of P450-Glo CYP3A4, 1A1 and 2C9 assay kits. The enzymatic activities were normalized to cell viability. HepG2 and human fibroblast cell were positive control and negative control, respectively. The results were obtained from three replicate readings.
