Fig. 4.

iSyn photocurrent to the BPEC involves both photosynthetic and respiratory systems. a CA measurements for iSynΔpsbA. b Action spectra: the obtained photocurrent was normalized to the photon energy input (external quantum efficiency) at different wavelengths. The external quantum efficiency of iSyn is shown in blue and that of iSynΔpsbA in red. A new measurement with fresh cells was used for each wavelength. c CA measurements for iSynΔpsbA without (red) and with (green) the addition of iodoacetate and in the presence (full line) or absence (dashed line) of glucose. d CA measurements for iSyn without (blue) and with (green) the addition of iodoacetate or in the presence (full line) or absence (dashed line) of glucose in the buffer