Figure 4. Scheme of hypothetical changes in redox potential of selected thiol/disulfide redox-regulation proteins upon the energized system by light, which induces increased and decreased pH in the stroma (blue box) and lumen (pink box) respectively . Redox-regulated proteins in the stroma are shown in the orange box. Proteins that have the Cys residues on the lumenal side are shown in the blue box. Note that HCF164 and LTO1 is transmembrane protein (section 3), but the shown redox potentials here are for the soluble domain of those. The asterisk indicates indicates changes in redox potential, two asterisks (**) for a changes of -60mV/pH and one asterisk (*) for changes of -30mV/pH. Lumenal thiols tend to easily gain reducing equivalents upon pH changes (increased redox potential) while stromal thiols are the opposite.