Fig. 6
From: Mechanistic insights into pH-dependent H2 photoproduction in bisulfite-treated Chlamydomonas cells
Schematic model representing the mechanism that optimal pH increases the yield of H2 photoproduction in NaHSO3-treated cells of C. reinhardtii. Compared to growth pH (pH 7.3), optimal pH (pH 8.0) decreases the ratio of NaHSO3 to Na2SO3 and consequently alleviates the inhibitory effects of NaHSO3 addition on PSII activity, and increases H2 photoproduction. The widths of the pink and black arrows indicate the levels of electron source and alternative electron sinks (PSI CET and CO2 fixation) for H2 photoproduction, respectively