Kinetic assays of SbCPR2s with different electron acceptors.A, kinetic assay in dependence on cytochrome c concentration with constant NADPH concentration, B, kinetic assay for dependence on NADPH concentration with constant cytochrome c concentration. C, kinetic assay with C3′H in dependence on p-coumaroyl shikimic acid. D, kinetic assay with C4H in dependence on 2-naphthoic acid as an alternative substrate. Velocities are normalized by enzyme concentrations. C3′H, p-coumaroyl shikimate/quinate 3′-hydroxylase; C4H, cinnamate 4-hydroxylase.