1.1.2.8 cytochrome c - 742793, 743174 1.1.2.8 cytochrome c natural electron acceptor 742110 1.1.2.8 cytochrome c prosthetic groups, four per enzyme 725041 1.1.2.8 additional information enzyme assays are performed with the artificial electron acceptors phenazine methosulfate and 2,6-dichlorophenolindophenol 742110, 742793 1.1.2.8 additional information one [2Fe-2S] cluster per enzyme 725041 1.1.2.8 pyrroloquinoline quinone - 389964, 724042, 725154, 741733 1.1.2.8 pyrroloquinoline quinone dependent on 762829 1.1.2.8 pyrroloquinoline quinone i.e. 2,7,9-tricarboxy-1H-pyrrolo-[2,3-f]quinoline-4,5-dione 702114 1.1.2.8 pyrroloquinoline quinone PQQ, a prosthetic group 743174 1.1.2.8 pyrroloquinoline quinone prosthetic group 742793 1.1.2.8 pyrroloquinoline quinone prosthetic group, dependent on 742110 1.1.2.8 pyrroloquinoline quinone prosthetic group, one per enzyme 725041 1.1.2.8 pyrroloquinoline quinone the binding pocket of pyrroloquinoline quinone contains a characteristic disulphide ring formed by two adjacent cysteine residues. Analysis by EPR spectroscopy shows that the disulfide ring is no prerequisite for the formation of the functionally important semiquinone form of pyrroloquinoline quinone 674560