Translocation to the nucleus and binding to xenobiotic response elements induced transcription of genes within the AhR battery.21 In breast, ovarian and renal cancer panels, sensitivity to aminophenylbenzothiazols including 5F 203 correlated with induction of CYP1A1 gene transcription9 and CYP1A1 protein expression.3 Here, CYP1A1 is linked to renal carcinoma.