Cryopreserved human hepatocytes were thawed and plated with HUREL PlatinumHeps™ Media supplemented with 10% serum and subsequently changed 24 hours post-seeding to HUREL PlatinumHeps™ Basal Media. CYP substrate concentrations are given in the table above along with metabolite formation recorded as nmoles/hr/106 cells. All incubations were carried out in triplicate on days 1, 4, and 8 upon cell delivery and incubated for 60 minutes. Reactions took place in a humidified incubator at 37°C, in 5% CO2. Collected supernatants were stored at -20°C until further LC/MS/MS analysis.