A recent study performed by the group of Murray identified CYP1B1 activity in renal cell carcinoma using an activity assay based on the O-deethylation of 7-ethoxyresorufin and the use of the CYP1A1/CYP1B1 inhibitor α-napthoflavone [47]. The gene discussed is CYP1B1; the disease is renal cell carcinoma.