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Relative percent glucuronide product formation for the reactions of UGT enzymes with: (A) 2',4'-dihydroxychalcone, (B) 3,2'-dihydroxychalcone, (C) 4,2'-dihydroxychalcone. Glucuronide product distributions were estimated using LC-UV chromatograms by dividing the individual glucuronide peak area by the sum of the peak areas for the unreacted aglycone and all glucuronide products for a given reaction. Relative standard deviations were generally less than 10% for replicate measurements.
