Fig. 3

Time-course production of (−)-menthol β-d-glucoside using UDP-d-glucose as a sugar donor with increasing concentration of BLC (0.03–3 μM). The reaction mixtures were incubated for 10 min, 1, 6, and 18 h and quantitatively analyzed by LC–MS/MS in MRM mode according to “Materials and methods”. The error bars represent the standard deviation of three independent experiments