Fig. 4: Type A and B product formation in N. benthamiana leaves.

The HsCPTa and HsCPTb genes were transiently expressed in N. benthamiana leaves, and transgenic disk sections were incubated with the acceptor substrate grandone 1. a, b Extracted ion chromatograms (m/z [M–H]– = 501.3010 ± 0.005) confirmed the formation of 7-epi-nemorosone 3 and 7-epi-clusianone 5 in leaves expressing HsCPTa and HsCPTb, respectively. c Neither product was observed in leaves infiltrated with the GFP-encoding control construct. d Authentic reference compounds.