. "The cytochrome B6-F complex mediates electron transfer betweenphotosystem II (PSII) and photosystem I (PSI), cyclic electron flow around PSI, and state transitions. This domain corresponds to the alpha helical transmembrane domain of the cytochrome B6-F complex iron-sulphur subunit. " . "CytB6-F_Fe-S" . "Cytochrome B6-F complex Fe-S subunit " . "Mistry J" . "Domain" . . . . . . . . . . . . . . . . . . . . . .