The expression of CYP2B6, CYP3A4, CYP3A5, CBR1, CBR3, MDR1, and CAR mRNA was measured in human primary hepatocytes as well as three representative lymphoma cell lines (SU-DHL-4, SU-DHL-6, and OCI-L-Y-3) following treatment with vehicle control (0.1% DMSO) or CITCO (1 μM) as described in the Materials and Methods. Expression of these genes was analyzed with RT-PCR. Data represent the mean ± S.D. of three independent experiments (***, p < 0.001).