Fig. 7

GC analysis of β-ionone hydrogenation by recombinant DBR1. b, c, d, e, and f β-ionone incubated for 0, 10, 20, 30, and 60 min, respectively. g and h The supplementary addition of 50 U recombinant DBR1 or 1 mmol/L NADPH after 30 min, total reaction time was 60 min. a Dihydro-β-ionone and β-ionone reference standard