Fig. 2
From: Engineering Escherichia coli for production of 4-hydroxymandelic acid using glucose–xylose mixture
HPLC and LC–MS analysis of 4-HMA produced by shmaS-expressing strain HMA. a HPLC analysis of standard 4-HMA. b LC–MS analysis of standard 4-HMA. c Identity of 4-HMA detected in the fermentation supernatant by HPLC analysis, compared the retention time to standard 4-HMA. d The identity of 4-HMA detected in the fermentation supernatant by LC–MS analysis, compared m/z to standard 4-HMA