Ferredoxin is a pivotal iron–sulphur protein that functions as an electron carrier in the photosynthetic electron transport chain. Within chloroplasts, photosystem I reduces ferredoxin, which in turn ...
In higher plants, ferredoxin (Fd):NADPH oxidoreductase (FNR) catalyzes reduction of NADP + in the final step of linear photosynthetic electron transport and is also implicated in cyclic electron flow.