HPLC analyses of the GT activity of protein extracts from<i>Arabidopsis</i> plants and <i>P. pastoris</i>.

The concentration of all phenols in the mixture is 0.2 mM. The estimated GT activity is expressed in mmol/min/mg for PGPS and arbutin and mAU·s/min/mg for catechol-glucoside formation. Data represent mean ± SD (n ±3). Statistical analysis of differences in PT Arabidopsis plants and P. pastoris with respect to WT Arabidopsis plants is performed using Dunnett’s two-tailed t-test. Significant difference is denoted with one (P<0.05) or two (P<0.01) asterisks.