Multistep, Eight-Electron Oxidation Catalyzed by the Cofactorless Oxidase, PqqC: Identification of Chemical Intermediates and Their Dependence on Molecular Oxygen

In the last paragraph of the Discussion (l. 8 from the bottom), we have misstated the ratio of Kd’s for the binding of PQQ and PQQH₂ to PqqC as 25. This ratio was based on a previously published value for Kd(PQQ) of 2 nM, whereas in the present work, we estimate Kd(PQQ) as 5 nM. The latter value leads to a ratio for Kd(PQQH₂)/Kd(PQQ) of ca. 10.