Editing Ferredoxin (section)

==== Electron bifurcation ====
The unfavourable reduction of Fd from a less reducing [[electron donor]] can be coupled simultaneously with the favourable reduction of an [[oxidizing agent]] through an [[electron bifurcation]] reaction.<ref name=Buckel2018/> An example of the electron bifurcation reaction is the generation of {{chem|Fd|red|-}} for [[nitrogen fixation]] in certain [[Aerobic organism|aerobic]] [[diazotroph]]s. Typically, in [[oxidative phosphorylation]] the transfer of electrons from [[NADH]] to [[ubiquinone]] (Q) is coupled to charging the proton motive force. In ''[[Azotobacter]]'' the energy released by transferring one electron from NADH to Q is used to simultaneously boost the transfer of one electron from NADH to Fd.<ref name=Ledbetter2017>{{cite journal | vauthors = Ledbetter RN, Garcia Costas AM, Lubner CE, Mulder DW, Tokmina-Lukaszewska M, Artz JH, Patterson A, Magnuson TS, Jay ZJ, Duan HD, Miller J, Plunkett MH, Hoben JP, Barney BM, Carlson RP, Miller AF, Bothner B, King PW, Peters JW, Seefeldt LC | title = The Electron Bifurcating FixABCX Protein Complex from Azotobacter vinelandii: Generation of Low-Potential Reducing Equivalents for Nitrogenase Catalysis | journal = Biochemistry | volume = 56 | issue = 32 | pages = 4177–4190 | date = August 2017 | pmid = 28704608 | pmc = 7610252 | doi = 10.1021/acs.biochem.7b00389 }}</ref><ref name="PoudelColman2018">{{cite journal | vauthors = Poudel S, Colman DR, Fixen KR, Ledbetter RN, Zheng Y, Pence N, Seefeldt LC, Peters JW, Harwood CS, Boyd ES | title = Electron Transfer to Nitrogenase in Different Genomic and Metabolic Backgrounds | journal = Journal of Bacteriology | volume = 200 | issue = 10 | date = May 2018 | pmid = 29483165 | doi = 10.1128/JB.00757-17 | pmc = 5915786 | doi-access = free }}</ref>