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. Author manuscript; available in PMC: 2014 Dec 17.
Published in final edited form as: Biochemistry. 2013 Dec 6;52(50):8975–8983. doi: 10.1021/bi4013534

Figure 2.

Figure 2

Trans-membrane electron transfer and Q-cycle mechanism in a schematic of the cytochrome b6f complex, indicating the branching of electrons from the anionic semiquinone reductant, PQp∸ and heme bp to O2, the latter reactions responsible for formation of superoxide, O2∸.