ycf6 Cytochrome b6-f complex subunit 8 MDIVSLAWAALMVVFTFSLSLVVWGRSGL Cytochrome b6-f complex subunit PetN Cytochrome b6-f complex subunit VIII petN 29 Component of the cytochrome b6-f complex, which mediates electron transfer between photosystem II (PSII) and photosystem I (PSI), cyclic electron flow around PSI, and state transitions (By similarity). PETN_SPIOL