Skip to main content
. Author manuscript; available in PMC: 2016 Sep 21.
Published in final edited form as: Chembiochem. 2015 Aug 10;16(14):1993–1996. doi: 10.1002/cbic.201500305

Figure 1.

Figure 1

Three CO2-reducing reaction systems based on V-nitrogenase: a) V-nitrogenase plus dithionite (designated system I), which permit ATP-dependent transfer of electrons from the [Fe4S4] cluster of Fe protein to the V-cluster (or cofactor) of VFe protein in an aqueous buffer; b) VFe protein plus Eu(II) DTPA (designated system II), which permit ATP-independent electron transfer from Eu(II) DTPA to the V-cluster of VFe protein in an aqueous buffer; and c) V-cluster plus SmI2 (designated system III), which permit ATP-independent electron transfer from SmI2 to the isolated V-cluster in an organic solvent. For the purpose of simplicity, only one half of the VFe protein is shown. HCs, hydrocarbons.