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Updated: Jul 13, 2026

EPR Monitored Redox Titration of the Cofactors of Saccharomyces cerevisiae Nar1
Published on: November 26, 2014
Question 1: the FeS/H2S system as a possible primordial source of redox energy
Mark Dörr1, Theodor Alpermann, Wolfgang Weigand
1Friedrich-Schiller-Universität Jena, Institut für Anorganische und Analytische Chemie, August-Bebel-Str. 2, 07743 Jena, Germany.
Abstract:
The theory of chemoautotrophy, as developed by Wächtershäuser, has been subject to experimental studies, which show a possible carbon fixation pathway of several consecutive steps from simple CO2 to amino acids, using the redox system of iron sulphide and hydrogen sulphide. Main findings were a mimicking of the acetyl-CoA enzyme reaction using the mixed sulphide (Fe,Ni)S and the reduction of dinitrogen to ammonia. Present studies aim at a more detailed investigation of the mechanism of the redox system FeS/H2S and its properties. For these studies a method to produce and immobilise FeS nanoparticles has been developed.
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