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Enzyme expression in human subcellular fractions. Subcellular fractions were run on an SDS-polyacrylamide gradient (4–12% w/v) gel to detect various carbonyl reductase enzymes and CYP2B6. Lane 1: liver microsome (LM). Lane 2: liver S9 (LS9). Lane 3: liver cytosolic (LC). Lane 4: intestinal microsome (IM). Lane 5: intestinal S9 (IS9). Lane 3: intestinal cytosolic (IC).
