Function
PetL is a component of the cytochrome b6-f complex. This complex plays a crucial role in mediating electron transfer between photosystem II (PSII) and photosystem I (PSI), facilitating cyclic electron flow around PSI, and regulating state transitions. PetL is essential for photoautotrophic growth, and it contributes significantly to the efficiency and stability of the cytochrome b6-f complex.