Human microsomes were purchased from Tebu-bio2 (Peterborough, UK). The microsomes were prepared from a pool of 50, mixed gender (20 mg protein ml⁻1) liver samples. DEHTP and MEHTP (purity 98.6%) were provided by BASF SE. All chemicals used were of analytical grade or higher; B-nicotinamide adenine dinucleotide phosphate (NADP), purity 97%, Glucose-6-phosphate, 98%–100%, Magnesium chloride, ACS reagent >99%, and Glucose-6-phosphate dehydrogenase (type V from baker’s yeast) were obtained from Sigma Aldrich. Potassium dihydrogen phosphate, analytical grade, and Di-potassium hydrogen phosphate, analytical grade, were obtained from Fisher Scientific.
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