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HPLC analysis of the enzymatic synthesis of rebaudioside A from stevioside using crude enzymes. a 1 g/l stevioside standard. b 0.8 g/l rebaudioside A standard. c Sample taken from reaction mixtures immediately; (d1–3) samples taken from reaction mixtures after a 0.5 h incubation with crude UGT76G1, CysQ-UGT and EDA-UGT
