Detection of monoterpenyl β-d-glucosides as products of VvGT7 by HPLC-electrospray ionization-MS/MS. A, HPLC-MS/MS analysis of linaloyl-β-d-glucoside (peak 1), neryl-β-d-glucoside (peak 2), geranyl-β-d-glucoside (peak 3), and citronellyl-β-d-glucoside (peak 4) of 0.1 mg mL−1. B to D, Neryl-β-d-glucoside (B), citronellyl-β-d-glucoside (C), and geranyl-β-d-glucoside (D) produced by VvGT7. Traces display the total ion current of the characteristic transitions (see “Materials and Methods”). Gaussian smoothing was applied.