This protein seems to be a 2Fe-2S ferredoxin. E(0) is -157 mV. This dioxygenase system consists of four proteins: the two subunits of the hydroxylase component (BphA and BphE), a ferredoxin (BphF) and a ferredoxin reductase (BphG). Belongs to the bacterial ring-hydroxylating dioxygenase ferredoxin component family.