Desulfovibrio gigas hydrogenase activity state

Li S, Hall MB (2001) Modeling the active sites of metalloenzymes. 4. Predictions of the unready states of [NiFe] Desulfovibrio gigas hydrogenase from density functional theory. Inorg. Chem. 40 18-24... 

In the case of the [FeNij-hydrogenase of Desulfovibrio gigas IR absorption in the 1900-2100 cm region has been assigned for each of the redox-active states [44], These data are collected in Table 2. This study revealed the presence of an EPR silent state labeled SU that exists as a mixture of two protonation states. The changes in IR properties have been used to determine the electrochemical potentials required for the changes in redox state. These data are presented in the following section. 

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