Fig. 4From: Biosynthesis of three N-acetylaminosugar-conjugated flavonoids using engineered Escherichia coli Comparison of production of quercetin 3-O-quinovosamine in different E. coli strains. 100 μM quercetin (30.2 mg/L) was added to the each culture. Approximately 4.6 mg/L of quercetin 3-O-glucose was detected in culture filtrate of the strain QS-2. All the added quercetin was consumed in the strain QS-4Back to article page