Fig. 1.

Updated model for the redox-regulatory systems in the chloroplast. Activation by light-dependent reduction (Red) of target proteins in the light (yellow background) and deactivation by oxidation (Ox) of target proteins with different specificities in the dark (gray background) are shown. Arrows indicate the flow of reducing power. PrxQ, peroxiredoxin Q; 2CP, 2-Cys Prx; FNR, ferredoxin-NADP⁺ reductase; PSI, photosystem I. Image credit: Daria Chrobok (DC SciArt). Adapted with permission from ref. 11.