ATPase activity of reconstituted NtPDR1 (A–D) or NpPDR5 (E) activity in the presence of different terpenoids.
A, sclareol. Km = 3.36 ± 1.36 μm, and the maximal stimulation is 54 ± 4%. B, cembrene. Km = 21.27 ± 6.02 μm, and the maximal stimulation is 89 ± 7%. C, capsidiol. Km = 41.47 ± 10.19 μm, and the maximal stimulation is 125 ± 12%. D, geranylgeraniol and eucalyptol at 50 μm. E, relative activity of reconstituted NpPDR5 in the presence or absence of 50 μm cembrene, sclareol, or capsidiol. Error bars represent S.D.