Glucuronidation assays were performed using UGT1A7 and UGT1A10-overexpressing baculosomes and UGT1A8-overexpressing HK293 cell homogenates, as described under Materials and Methods. No detectable glucuornidation activity was observed against 7-OH-BaP for homogenates from cells overexpressing UGT1A6 or UGT2B4, or for UGT2B17-overexpressing microsomes. Kinetic parameters were calculated based on three individual experiments for each UGT examined.